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In KPM Engineering Solution Pvt. Ltd our solutions are Thermal Imager camera, fever monitoring solution, Relay Test Kit, CT/PT Analyzer, Oil BDV, Transformer Testing , Circuit Breaker Testing, LA Testing, Ground Testing, Partial Discharge Testing. Visit www.kpmtek.com for details Galerie vidéo Photos Videos Anchor 1 Galerie vidéo Load More Galerie vidéo All Videos All Videos Lire la vidéo Partager Chaîne entière Cette vidéo Facebook Twitter Pinterest Tumblr Copiez le lien Lien copié Search videos Rechercher une vidéo... Lecture en cours Battery Load Bank 00:27 Lire la vidéo Lecture en cours CTA Demo 24 00:30 Lire la vidéo Lecture en cours KPM CBA Dispatch 00:22 Lire la vidéo Anchor 2

KPM India |We are electrical test equipment manufacturers, We deal in CT PT Analyzer, Relay Test Kit , Tan delta , Transformer Test Kits , LA Testers etc.|PD Detector (Analog) |https://kpmtek.wixsite.com/website/fr/pd-detector-analog Détecteur PD (Analogique)

KPM India |We are electrical test equipment manufacturers, We deal in CT PT Analyzer, Relay Test Kit , Tan delta , Transformer Test Kits , LA Testers etc.|High Current Unit |https://kpmtek.wixsite.com/website/fr/highcurrentunit Unité à courant élevé

KPM's Partial discharge range of equipment are as below -: 1) Hand Held PD monitoring units used by electrical maintenance & repair professionals. 2) HV laboratory PD Monitoring Systems used by manufacturers 3) Online PD monitoring facilities used for PD monitoring of critical PD Resources SURVEILLANCE DE DP ET DE TERRE EN LIGNE KPM PENTA PD (HAND HELD) View more Partial Discharge Detector Penta-PD is an ideal partner for condition-based maintenance programs. Partial Discharge Detector Penta-PD incorporates all 5 types of online PD sensor technology. Information from multiple sensors gives Partial Discharge Detector Penta-PD the versatility to detect various type PD in variety of substation apparatus. KPM PDM-01,Partial Discharge Monitor View more The KPM PDM-01 partial discharge detector stands out as a versatile digital tool within KPM's product range. Featuring a 10.1-inch touch screen, it replaces the traditional oscilloscope tube and physical knob operation, enhancing user convenience. The instrument employs a full touch screen interface, contributing to extended product longevity and incorporates useful features such as automatic correction, high voltage divider ratio settings, and serial communication for uploading test data. KPM PDTI Cable Termination Monitor View more The KPM PDTI system is deployed on primary switching equipment such as ring network switch cabinets, cable termination boxes, and transformer output cables etc. within the power distribution network. Its primary function is to conduct online monitoring of partial discharge, indicating potential short circuits and ground faults in corresponding cable sections, along with real-time temperature monitoring. KPM Corona Pointer View more KPM Corona Pointer is an ideal equipment for condition-based maintenance programs. Online partial discharge testing is a method of inspecting the insulation of electric power systems while equipment remains energized and in service. Corona Pointer is based on online Ultrasonic PD sensor technology. KPM Duo PD - Handheld PD monitoring system View more KPM Duo PD is a handheld partial discharge tester which uses the ultrasonic signal generated by partial discharge to determine the existence and location of partial discharge and combines the real-time displayed images and data to quickly diagnose partial discharge conditions. KPM PDA-01, Partial Discharge Monitor View more The KPM PDA-01 features a split, modular design, with the local discharge signal conditioning module, digital acquisition module, and test voltage acquisition module integrated into the instrument. The powerful local discharge test and analysis system software is installed on the host computer, which connects to the instrument via USB and RS232 serial ports. KPM PD Pulse-8, Online Partial Discharge Monitor View more KPM PD Pulse-8 partial discharge online monitoring device includes a modularly designed partial discharge sensor and a partial discharge data processing terminal. The partial discharge sensor can effectively monitor ultrasonic and transient earth voltage signals. Its sensors are a two-in-one integrated assembly that can be installed on the HV equipment. Foire aux questions (FAQ) FAQ about Partial discharge : 01 What are the Top 5 PD Testing Techniques – A Quick Comparison? 1) Ultrasonic PD Detection - Detects sound waves from PD events - Portable, good for on-site inspections - Limited sensitivity in noisy environments 2) High-Frequency Current Transformer (HFCT) - Measures high-frequency currents on cables - Effective for early PD detection - Requires access to grounding points 3) Transient Earth Voltage (TEV) - Detects electromagnetic signals from PD inside metal enclosures - Non-intrusive and widely used in switchgear - Limited for external PD sources 4) Oscilloscopic PD Measurement - Directly captures PD pulses using specialized sensors - Very detailed and accurate - Requires expert analysis and controlled environment 5) Acoustic Emission (AE) Sensors - Captures elastic waves from PD activity - Useful for localizing PD sources - Can be affected by external noise - KPM offers advanced PD measurement systems combining multiple techniques for comprehensive, reliable diagnostics. 02 What do you understanding AE, HFCT, TEV, and UHF – Which PD Kit Do You Need? Choosing the right Partial Discharge (PD) testing kit depends on your equipment type, accessibility, and testing goals. Here’s a quick comparison: 1. AE – Acoustic Emission How it works: Detects sound waves from PD using piezoelectric sensors. Best for: Transformers, bushings, and GIS (localizing PD points). Pros: Non-invasive, good for pinpointing PD. Limitations: Sensitive to external noise. 2. HFCT – High-Frequency Current Transformer How it works: Clamped around the grounding conductor to detect PD pulses. Best for: Cables, terminations, rotating machines. Pros: Early detection, non-intrusive. Limitations: Needs grounding access; less effective in noisy ground systems. 3. TEV – Transient Earth Voltage How it works: Senses electromagnetic emissions on metal-clad switchgear. Best for: MV switchgear (metal-enclosed). Pros: Easy to use, fast screening. Limitations: Doesn’t work well on non-metallic enclosures. 4. UHF – Ultra High Frequency How it works: Captures high-frequency EM waves from PD (300 MHz+). Best for: GIS, gas-insulated transformers, sealed systems. Pros: Very sensitive and noise-immune. Limitations: Needs access to UHF sensors or couplers. Which Kit Do You Need? For switchgear: TEV + AE For cables and rotating machines: HFCT For GIS or sealed systems: UHF + AE For transformers and bushings: AE + HFCT KPM offers hybrid PD testing kits combining AE, TEV, HFCT, and UHF sensors for complete diagnostics across all asset types—helping you localize, classify, and trend PD activity efficiently. 03 What is principle of detecting PD in Switchgear Using TEV Method ? The Transient Earth Voltage (TEV) method detects partial discharge activity in metal-clad switchgear by capturing fast, high-frequency voltage transients that appear on the internal metal surfaces of the switchgear enclosure. How It Works: When partial discharge occurs inside the insulation of live parts (e.g., busbars, bushings), it emits electromagnetic pulses. These pulses induce high-frequency voltage transients on the inner surface of the switchgear's metal enclosure. These transients propagate through the metal, eventually reaching the outer surface. A TEV sensor, placed magnetically or capacitively on the metal surface, detects these transient voltages—typically in the range of MHz frequencies. Why It Works Well for Switchgear: Switchgear panels are metal-enclosed, which acts as a waveguide for the transient signals. TEV signals indicate internal insulation defects like surface tracking, void discharges, or corona inside the equipment. TEV detection is non-invasive, requires no shutdown, and is widely used for condition-based maintenance. What TEV Tells You: Presence of internal PD Severity of the discharge (by amplitude and repetition rate) Useful for early detection before insulation failure KPM’s PD testing kits integrate TEV sensors with digital displays and trending software, making it easy to perform on-site diagnostics of medium-voltage switchgear for early PD detection and risk assessment. 04 What are the Diagnosing Cable Defects With HFCT-Based PD Testing ? High-Frequency Current Transformer (HFCT) sensors are widely used for detecting and diagnosing partial discharge (PD) activity in power cables. They are clamped around the earth (ground) conductor to sense high-frequency current pulses generated by insulation defects. How HFCT PD Testing Works: PD Activity Inside Cable Insulation: Voids, cracks, or deteriorated insulation cause small electrical discharges. Pulse Propagation: These discharges generate high-frequency current pulses (MHz range) that flow along the grounding system. HFCT Sensor Detection: The HFCT sensor detects these pulses non-invasively by clamping it around the cable’s earth conductor without disconnecting the system. Signal Analysis: The captured pulses are analyzed for: Pulse shape and repetition rate Time-of-flight (for PD location) Amplitude and phase-resolved patterns (PRPD) What It Diagnoses: Defects in cable joints, terminations, insulation Water trees or aging in XLPE cables Internal corona or tracking activity Advantages of HFCT PD Testing: Online or offline testing possible Non-intrusive and safe Early detection prevents costly cable failures Can be used with multiple sensors for PD location (triangulation) KPM’s HFCT-based PD testing solutions are designed for rapid setup, high sensitivity, and advanced diagnostics—enabling utilities and industries to monitor cable health with confidence. 05 What is UHF PD Testing in GIS – High Sensitivity Explained? Ultra High Frequency (UHF) PD testing in Gas-Insulated Switchgear (GIS) is a highly sensitive method that detects partial discharge by capturing electromagnetic signals in the 300 MHz to 1.5 GHz range. GIS enclosures, being metallic and sealed, confine PD signals and create a low-noise environment—making UHF detection extremely effective. UHF sensors, typically built into or attached to the GIS via couplers or antennae, pick up these fast transients without interfering with system operation. This method offers excellent immunity to external noise and allows early detection of insulation defects such as voids, surface discharges, or corona, enabling preventive maintenance and reducing outage risk. KPM’s UHF PD solutions are optimized for GIS testing, offering precise, real-time diagnostics with minimal intrusion. 06 How PD Can Cause Catastrophic Failures If Left Undetected ? Partial Discharge (PD) is a small electrical spark that occurs within insulation systems due to defects like voids, cracks, or contamination. While each discharge releases only a small amount of energy, repeated activity degrades insulation over time, leading to progressive damage. If left undetected, PD can cause tracking, erosion, thermal breakdown, and eventually a complete insulation failure. This can result in catastrophic equipment breakdowns, fires, arc flash events, or prolonged outages. Early PD detection helps identify developing faults before they escalate, allowing timely intervention. KPM’s PD monitoring solutions provide accurate diagnostics to prevent such costly and dangerous failures. 07 How Often Should You Perform Partial Discharge Tests? The frequency of Partial Discharge (PD) testing depends on equipment type, criticality, age, and operating environment: New Installations: Test during commissioning to detect manufacturing or installation defects. Routine Maintenance: For critical assets (e.g., GIS, transformers, cables): annually or semi-annually For less critical systems: every 2–3 years Condition-Based Monitoring: For aging or high-risk equipment, use continuous or periodic online PD monitoring. After Major Events: Test after faults, repairs, or overloading. KPM offers both portable and continuous PD monitoring solutions tailored to asset condition and reliability goals. 08 What is Acoustic Emission for PD Detection – Emerging Trends? Acoustic Emission (AE) is an emerging technique in Partial Discharge (PD) detection, leveraging sound waves generated by PD activity within high-voltage equipment. AE sensors capture ultrasonic emissions, allowing non-intrusive, real-time monitoring of insulation health. Recent trends include the integration of AI algorithms for noise discrimination, wireless AE sensor networks for wide-area monitoring, and hybrid systems combining AE with UHF or HFCT methods for higher accuracy. KPM’s PD monitoring device incorporates these advancements by using sensitive AE sensors to detect PD in transformers, switchgear, and cable terminations. The system filters external noise and correlates AE signals with discharge activity, ensuring precise fault localization. Its compact design, cloud integration, and user-friendly interface make it suitable for continuous condition monitoring. This enables utilities to predict insulation failure early, plan timely maintenance, and improve grid reliability while aligning with modern digital substation standards. 09 What to Watch Out For while working on PD Testing in Motors and Generators ? Partial Discharge (PD) testing in motors and generators is critical for identifying early insulation deterioration, especially in high-voltage rotating machines. Key factors to watch out for include surface discharge near end windings, slot discharges, and internal PD caused by insulation voids. External noise interference, poor sensor placement, and incorrect test settings can lead to false readings or missed defects. It’s essential to differentiate between actual PD signals and electrical noise, especially in operational (online) testing. KPM’s PD tester addresses these challenges with high-frequency current transformer (HFCT) sensors, advanced noise separation algorithms. The device enables clear PD signal capture even in electrically noisy environments. It provides real-time analysis, waveform capture, and trend data, helping maintenance teams make informed decisions. KPM’s compact, rugged design and intuitive interface make it ideal for field diagnostics in motors and generators across power plants and industrial sites. 10 How to Interpret PD Signals? Interpreting Partial Discharge (PD) signals is crucial for diagnosing insulation issues accurately. Real-world case studies reveal that many failures arise not from PD presence, but from misinterpretation. In one case, a generator end-winding PD signal was mistaken for noise due to poor sensor grounding. Another involved a cable joint where increasing PD magnitude over time indicated a void-related breakdown—early intervention prevented a costly outage. Key learnings include the importance of phase-resolved PD (PRPD) pattern analysis, baseline signal comparison, and monitoring PD trends over time. Environmental noise, load conditions, and sensor placement significantly impact data quality. KPM’s PD tester simplifies interpretation with built-in PRPD pattern recognition, automated classification, and trend analytics. Its intelligent algorithms filter out noise and identify critical PD types—internal, surface, or corona—with high accuracy. By offering both real-time insights and historical tracking, KPM's tester empowers engineers to make confident maintenance decisions and extend asset life. FAQ about Monitoring testing : 01 What is the use of online partial discharge (PD) monitoring of panels using TEV and contact ultrasonic methods? Online partial discharge monitoring of medium-voltage and high-voltage panels using TEV (Transient Earth Voltage) and contact ultrasonic methods is used to detect and localize internal insulation defects and surface discharges without shutting down the equipment. Here's how each method contributes: 1. TEV (Transient Earth Voltage) Method Use: Detects internal PD activity, especially within air-insulated switchgear (AIS) and cable terminations inside metal-clad panels. How it works? When PD occurs inside enclosed metal-clad gear, it emits fast-rising electromagnetic pulses that induce transient voltages on the metal surfaces. TEV sensors pick up these signals from outside the panel. Benefit: Non-invasive, detects internal voids, tracking, and corona effects. 2. Contact Ultrasonic Method Use: Detects surface discharges, such as corona or tracking, which emit high-frequency acoustic signals. How it works? A piezoelectric sensor placed on the panel surface detects ultrasonic noise generated by PD activity, even through the enclosure. Benefit: Helps locate poor insulation, loose connections, or contamination issues causing discharge on the surface. Combined Use – Why It Matters? Using both TEV and ultrasonic methods together enhances diagnostic accuracy: TEV gives insight into internal discharge severity and location. Ultrasonic confirms surface or near-surface PD sources and allows cross-verification. This dual-method approach is vital for: Preventive maintenance, Avoiding insulation failures, Improving switchgear reliability, and Extending equipment life without needing shutdowns.

KPM Solutions|We are electrical Test Equipment supplier |https://www.kpmtek.com/test-equipment |  Relay Test Kits  CT/PT Analyzers  LA Testers  TTR , Transformer Turns Ratio  TWRT (Transformer Winding Resistance Tester)  Tan delta  Partial Discharge Testing ( Portable )  etc ÉQUIPEMENT D'ESSAI DU SYSTÈME ÉLECTRIQUE KPM VIT-100 KPM Vacuum Interrupter Tester KPM ICAL Pro KPM Instrument Calibrator KPM MT 3000 D+ Three phase Reference Standard Energy Meter specially used for energy meter on-site test KPM PSR12 KPM’s Power Signal Recorder 12 KPM TD12 A+ Automatic 12KV Capacitance & Dissipation Factor Test Set KPM TWRT YY 3 Phase Winding Resistance Tester with automatic change of connections Energy Meter Test Benchs 3 phase energy meter test bench for testing energy meters of 0.5 to 0.02 accuracy levels. KPM-SG_70kV, 70mA Cable Testing Surge Generator / Thumper KPM LBVV 240V 110A Battery Discharge Kit (Constant Current , Constant Power) KPM LB4815+ Battery Load Bank , Constant Current, Constant Power , Constant Resistance Mode KPM AL- 80H Battery Pack Air Leak Tester KPM AL- 80L KPM Battery Pack Air Leak Tester KPM CCDB + Series KPM Li Ion Cell Charge Discharge & Balancer KPM CCDB SERIES KPM Li Ion Cell Charge Discharge & Balancer KPM PDH SERIES KPM Pack Discharging (800V / 1000V) KPM PCD Series KPM li Ion Battery Pack Charge Discharge Test kit PCDH Series KPM li Ion Battery Pack Charge Discharge Test kit ( 800V / 1000V ) KPM MCD 2550 KPM charging , discharging & cyclic charging - discharging of Li Ion modules , Constant Current Discharge KPM CCDB 5V 15A KPM Li-ion Cell Charge Discharge Balancing kit, Constant Current Discharge (5V, 15 A) KPM BCD 0550 KPM Li-ion Battery Charging Discharging kit , Constant Current Discharge (5V, 50 A), Used for high current applications like forklifts, cranes etc. KPM BCD 0530 KPM Li-ion Battery Charging Discharging kit (5V, 30A), Constant Current Discharge , Used for high current applications like forklifts, cranes etc. KPM BCD B-4X KPM Li-ion Battery Charging Discharging kit with 4 independent channels (100A), Constant Current Discharge , Used for high current applications like forklifts, cranes etc. KPM KS30 KPM SF6 Gas Analyzer KPM BA-02 Battery Analyzer for testing battery internal resistance, conductance and voltage. Auto increase in the serial number of results using touch and test function, this also reduces testing time KPM Battery Data Logger To check Battery voltage, current and temperature. These sensors are integrated with battery discharge units KPM LA 103 Pro LA Tester measures and displays the values of Total Leakage Current and Third Harmonic Resistive Leakage Current directly with ambient temperature and line harmonic compensation KPM ER1 KPM ER1C is the Three phase Reference Standard Energy Meter specially used to calibrate single phase energy meter on-site . KPM AC HIPOT KPM Cable testing KPM VLF Hipot Tester KPM VLF HIGH VOLTAGE TESTER Hipot Tester KPM DC HIPOT KPM DC Hipot Test Set KPM TD 40 KPM 40kV Tan Delta measurement unit used for cable testing KPM VLF Series KPM VLF series with Tan Delta & PD Measurement Facility KPM Penta Pd pro Hand held Partial Discharge Tester with multichannel PD detection functions which can be integrated with multiple sensors like UHF , TEV, HFCT, AE , Contact Acoustic etc. KPM CEST 1800 KPM’s Clamp Earth & Spike Tester KPM CRT 6002G Contact Resistance Tester with single-end and double-end grounding test technology, It is available in 200A & 600A KPM Onload Tap Changer Analyzer Onload Tap Changer Analyzer is testing key parameters of an OLTC such as ,Transient time, Transition waveform, Transition resistance, Synchronization status of three phase. td12 Automatic 12KV Capacitance & Dissipation Factor Test Set with 4 Nos channels for Bushing testing in one test , Built In 10kV - 5mA Diagnostic Insulation Tester KPM APIK Automatic Primary Injection Kit is used for high voltage switch testing, protection system testing and current transformer testing in power system KPM CTA C+ CT Analyzer ( for factory & field applications ) KPM CT/PT Tester pro An automatic device used for testing of instrument transformers (CTs & PTs) by injection of secondary voltage. This is capable of ratio error , phase error , winding resistance, knee point upto 2kV etc. K3063i 6I & 4U - Automatic Relay Test Kit RTK(KPM KFA 300) The Lightest Relay Test Kit with 3 Current Sources & 4 voltage sources . Builtin software with AC Test , DC Test , Frequency Test , Distance Test , Harmonic Test Modules RTK(K316i) Automatic Relay Test Kit ( 6I,4U) KPM-DPM-01 KPM Dew Point Meter K68i Relay test kit 3I & 4U - Automatic Relay Test Kit RTK KPM KF 86P Automatic Relay Test Kit with 6 current and 6 voltages , with advanced software with RIO / XRIO Import function KPM CT/PT analyzer It tests all type of CT/PT as per IEC standards (deal tool for CT/PT Manufacturers & Utility Customers) KPM CT:PT Tester KPM CT PT Testing , Primary Current Method CT PT PRO KPM CT PT Tester , Voltage Ratio Method KPM CT/PT HVCTR High Voltage Current Transformer Ratio Tester measures Key CT parameters of upto 33KV system KPM CT/PT PIK For testing Current Transformer , Circuit Breakers etc. by injecting current in Primary side of CT. Moduler design for transporting easily KPM TD12 KPM 12kV Tan delta Tester / Dissipation Tester KPM TTR3 On-site measurement of DC resistance of transformer or motors (High Current Source of 20 A) KPM SFRA 01 Sweep Frequency Response Analysis Test Set (SFRA) for checking the core and winding integrity of a power transformer KPM TWRT Series On-site measurement of DC resistance of transformer (High Current Source of 20 A) KPM 5KP 5 KV Diagnostic Insulation Tester KPM 5KP+ IR Tester ( 5KV, 10KV, 15KV, 20KV) TPL-Trans Power Loss Tester KPM Transformer Power Loss Analyzer OLTC Analyzer KPM Online Tap Changer Tester KPM CB Analyzer KPM Circuit Breaker Analyzer KPM CBA 01 KPM Circuit Breaker Tester KPM CRT Contact Resistance Tester CBT-01 KPM Circuit Breaker Timer VILA KPM Vacuum Interrupter Life Analyzer KPM Oil BDV 100+ KPM Oil Breakdown Voltage Test Kit KPM Oil BDV 100 A+ KPM Oil Breakdown Voltage Test Kit with variable rate of rise voltage KPM OT-01 CC KPM Flash Point Tester Close Cup KPM OT-01 OC KPM Flash Point Tester Open cup KPM OT 02 KPM Karl Fischer Tester , Moisture in oil tester KPM OT O3 KPM Viscosity Tester KPM OT-05 KPM Oil Acid Value Tester KPM OT01 KPM Oil Tan Delta Furan Tester KPM FT-01 KPM HPLC , Furan Tester KPM IPT 01 KPM Imputiry Particle Tester KPM PCM 01 KPM Petroleum Colorimeter KPM ODT 01 KPM Oil Density Tester KPM Interfacial Tension Meter KPM Interfacial Tension Meter KPM-OPPT-01 KPM Oil Pour Point Tester KPM PDTI Monitor KPM Online Partial Discharge Monitor with Temperature & Sht. Ckt Current for HV Cable terminations KPM PDM-01 KPM Partial Discharge Monitor KPM Duo PD KPM online Partial Discharge Tester with acoustic and TEV sensors KPM PD Pulse-8 KPM Online PD Tester for PD Monitoring of switchgears and Ring Main Units KPM PDA-01 KPM Partial Discharge Analyzer , electrical method KPM Penta PD KPM Hand Held partial discharge Tester with TEV , HFCT, AE , Contact Acoustic, UHF sensors KPM CORONA POINTER KPM PD Pointer for laboratory corona finding KPM PQA+ KPM Power Quality Analyzer and recorder KPM - PQ Analyzer Light KPM Power Quality Analyzer and recorder KPM LA 100 + , LA TESTER KPM LA Tester / Surge arrester Tester / MOA Tester / 3rd harmonic leakage current tester kpm la 103+ KPM LA Tester / Surge arrester Tester / MOA Tester / 3rd harmonic leakage current tester KPM MT 3000 D 3-Phase energy meter tester KPM SF6 DPM Light KPM SF6 Dew Point Meter KPM CTTC KPM CT Heat Run Test Device KPM CEST KPM Clamp Earth Spike Tester KPM CET 1200 KPM Clamp Earth Tester KPM ET30K KPM Earth Tester with Spikes KPM GERM KPM Online Grid Earth Resistance Monitor KPM CM-0524 KPM Cell Voltage Monitor for Li Ion Batteries KPM battery load bank KPM DC Load Bank , KPM Battery Discharge Kit , KPM Constant Current DC load banks

KPM LA100+ & KPM LA 103+ is used for testing health of lightning arresters. It is also known as MOA Tester , Surge Arrester Tester/leakage current monitor/LCM etc. https://www.kpmtek.com/lightningarrestertestkit TROUSSE D'ESSAI DE PARE-FOUDRE ( LCM ) Théorie Testeur de parafoudre 1 Ph en ligne (avec mesure de tension et de courant) Catalogue Le testeur de parafoudres de KPM (KPM LA-100+) est l'instrument spécial à utiliser pour détecter les propriétés électriques des parafoudres (LA/MOSA). KPM LA-100+ is capable of testing LA en ligne en utilisant la mesure du courant de fuite LA et de la tension de ligne PT directement pour la plupart des résultats fiables CEI . Caractéristiques du produit of Testeur de parafoudre (KPM LA-100+) Écran LCD grand écran, menu utilisateur en anglais, facile à utiliser. Utilisez les techniques d'échantillonnage de précision et d'analyse harmonique de Fourier pour obtenir des données fiables. Mesure le courant résistif 3ème harmonique, Courant résistif total, Courant de fuite total,_cc781905-5cde-3194-bb3b-136bad5cfI58d_Angle V-I58d Batterie rechargeable, horloge calendrier, micro-imprimante intégrée, peut stocker 120 données de mesure de groupe Testeur LA triphasé en ligne (avec capteur E sans fil et mesure du courant) Catalogue KPM's Testeur de parafoudre triphasé(KPM LA-103+) est l'instrument spécial à utiliser pour détecter les propriétés électriques des parafoudres (LA/MOSA). KPM LA-103+ is capable of testing LA en ligne en utilisant six méthodes principales selon CEI - : 1. Grand écran LCD, fonctionnement complet du menu en anglais, facile à utiliser. 2 En utilisant des circuits d'échantillonnage et de traitement de haute précision, des techniques avancées d'analyse harmonique de Fourier pour fiabiliser les données. 3. L'instrument utilise des signaux de tension et de courant directement capturés et entrés par un capteur numérique unique à isolation magnétique à grande vitesse pour assurer la fiabilité et la sécurité des données 4. Cet équipement peut utiliser un champ électrique induit ou une méthode de transmission sans fil au lieu d'un câblage secondaire PT. 5. L'instrument n'a pas besoin de connecter le secondaire PT et peut mesurer directement le courant résistif. 6. Il existe six méthodes de test, offrant de nombreux choix pour la personne sur site. ( PT méthode secondaire, méthode d'induction, méthode de transmission sans fil, méthode de synchronisation à courant unique, méthode de synchronisation secondaire pt) Testeur LA triphasé en ligne (avec capteur E sans fil et mesure du courant) Catalogue KPM's Testeur de parafoudre triphasé(KPM LA-103+) est l'instrument spécial à utiliser pour détecter les propriétés électriques des parafoudres (LA/MOSA). KPM LA-103+ is capable of testing LA en ligne en utilisant six méthodes principales selon CEI - : 1. Grand écran LCD, fonctionnement complet du menu en anglais, facile à utiliser. 2 En utilisant des circuits d'échantillonnage et de traitement de haute précision, des techniques avancées d'analyse harmonique de Fourier pour fiabiliser les données. 3. L'instrument utilise des signaux de tension et de courant directement capturés et entrés par un capteur numérique unique à isolation magnétique à grande vitesse pour assurer la fiabilité et la sécurité des données 4. Cet équipement peut utiliser un champ électrique induit ou une méthode de transmission sans fil au lieu d'un câblage secondaire PT. 5. L'instrument n'a pas besoin de connecter le secondaire PT et peut mesurer directement le courant résistif. 6. Il existe six méthodes de test, offrant de nombreux choix pour la personne sur site. ( PT méthode secondaire, méthode d'induction, méthode de transmission sans fil, méthode de synchronisation à courant unique, méthode de synchronisation secondaire pt) Theory - LA Tester Test de parafoudre théorique Parafoudre – Théorie Un parafoudre est un dispositif utilisé sur les systèmes d'alimentation électrique et les systèmes de télécommunications pour protéger l'isolation. et les conducteurs du système contre les effets néfastes de la foudre. Le parafoudre typique a une borne haute tension et une borne de terre. Lorsqu'une surtension de foudre (ou une surtension de commutation) se déplace le long de la ligne électrique jusqu'au parafoudre, le courant de la surtension est dévié à travers le parafoudre, dans la plupart des cas vers la terre. Si la protection échoue ou est absente, la foudre qui frappe le système électrique introduit des milliers de kilovolts qui peuvent endommager les lignes de transmission et peuvent également causer de graves dommages aux transformateurs et autres appareils électriques ou électroniques. Les pics de tension extrêmes produits par la foudre dans les lignes électriques entrantes peuvent également endommager les appareils électroménagers, c'est pourquoi il est sacrément crucial pour l'intégrité du parafoudre. Actuellement, la surveillance du courant de fuite total (courants capacitifs et résistifs) est utilisée par de nombreux services publics. Les moniteurs de courant de fuite sont utilisés pour mesurer le courant de fuite des parafoudres et, en cas de courant de fuite élevé, les parafoudres sont remplacés. Cependant, on estime que cette méthode n'est pas la méthode infaillible car le courant de fuite total, qui est purement capacitif, ne signifie pas précisément la santé des parafoudres. Il y a eu des cas où les parafoudres ont explosé même si la valeur totale du courant de fuite était inférieure à la limite prescrite par les fabricants. Le courant résistif est de 15 à 30 % du courant total et, comme les courants capacitifs et résistifs sont décalés de 90 degrés, même un changement considérable du courant résistif entraîne une très faible augmentation du courant total. Par conséquent, la surveillance du courant de fuite total peut ne pas vraiment indiquer la dégradation du disque ZnO. La dégradation d'un long disque de ZnO linéaire conduit généralement à des harmoniques dans le courant de fuite lorsque la tension du système de fréquence fondamentale est appliquée. La mesure du courant résistif de troisième harmonique est basée sur le filtrage de la composante de troisième harmonique du courant de fuite total. Un courant de fuite de l'ordre d'environ 500 microampères est généralement considéré comme sûr. La partie résistive du courant de fuite ou la perte de puissance peut être déterminée par plusieurs méthodes indiquées ci-dessous : Utilisation d'un signal de tension comme référence Compenser la composante capacitive en utilisant un signal de tension Compensation capacitive en combinant le courant de fuite des trois phases Analyse des harmoniques du troisième ordre Détermination directe des pertes de puissance Analyse des harmoniques de rang 3 avec compensation des harmoniques de la tension Système de surveillance avancé avec calculs de composants "courant résistif". L'utilisation de méthodes de diagnostic avancées réduit considérablement les risques d'échec et évite ainsi les pertes humaines et financières. Il est donc souhaitable de vérifier l'état des parafoudres à intervalles de temps réguliers, en mesurant la composante résistive du courant de fuite continu en service sans mettre le parafoudre hors tension. Des mesures fiables sont réalisées par les instruments basés sur le principe du « signal de tension » comme référence. La surveillance régulière de LA a permis d'éviter de nombreuses défaillances dans les sous-stations de 66 kV à 765 kV. Les valeurs de ce courant varient normalement de fractions de milliampères à quelques milliampères, et sont caractérisées par des variations de courant résistif dont la valeur est un indicateur de la détérioration du Surge Arrester. La composante résistive de ce courant de fuite peut augmenter en raison de différentes contraintes provoquant le vieillissement et provoquant finalement des défaillances du parafoudre. Foire aux questions (FAQ) FAQ about lightning arrester testing : 01 What is the purpose of online testing for lightning arresters? The purpose of online testing for HV lightning arresters is to evaluate their health and operational condition while they remain energized and connected to the high-voltage system. This non-intrusive testing monitors critical parameters—especially leakage current—to detect early signs of insulation degradation, moisture ingress, or internal damage. By performing these tests without disconnecting the arrester, utilities can ensure continuous protection against transient over voltages, prevent unexpected failures, and schedule maintenance proactively, thereby enhancing system reliability and safety. 02 How does online testing differ from offline testing of lightning arresters? Online testing of lightning arresters is performed while the arrester is energized and connected to the live high-voltage system. It monitors parameters like leakage current and voltage in real time to assess the arrester’s condition without interrupting power supply or removing the arrester from service. Offline testing, on the other hand, requires disconnecting the arrester from the system and applying controlled test voltages or impulses in a laboratory or test environment. This allows detailed diagnostic tests, such as insulation resistance, dielectric withstand, and energy absorption capability, but causes downtime and power disruption. In summary, online testing enables continuous condition monitoring without service interruption, while offline testing offers more comprehensive diagnostics but requires taking the arrester out of operation. 03 What parameters are measured during online testing of lightning arresters? During online testing of lightning arresters, the key parameters measured include: Leakage current: Both resistive and capacitive components are monitored to detect insulation deterioration or moisture ingress. Discharge current: Measures the arrester’s response to transient overvoltages. Voltage across the arrester: To correlate leakage current with operating voltage. Power factor (dissipation factor): Indicates the level of insulation losses and ageing. Harmonic content of leakage current: Helps identify partial discharges or defects. Continuous monitoring of these parameters helps identify early signs of failure and evaluate arrester condition in real time. 04 What types of leakage current patterns indicate a failing arrester? In surge arresters (typically metal oxide varistor or MOV-based), leakage current patterns can offer early warning signs of deterioration or failure. Here are the key types of leakage current patterns that indicate a failing arrester: 1. Increasing Total Leakage Current Over Time What it means: The arrester is gradually losing its insulation resistance. Cause: Ageing of the zinc oxide blocks or moisture ingress. Warning: A consistent upward trend is a red flag — especially under normal system voltage. 2. High Resistive Leakage Current What it means: An increase in resistive (non-linear) current indicates internal degradation. Why it's critical: Unlike capacitive leakage (which is normal), resistive leakage is a sign of arrester deterioration. How it shows up: Measured using third-harmonic analysis or waveform separation techniques. 3. Sudden Jumps or Spikes in Leakage Current What it means: Possible internal flashover, moisture ingress, or external contamination. Typical sign: A sharp increase without a gradual trend. Next step: Immediate inspection or replacement is usually advised. 4. Leakage Current with Strong Daily Variation What it means: Leakage current rises during daytime due to heating and falls at night — abnormal if variation is large. Potential cause: Moisture or contamination interacting with thermal cycles. 5. Phase Shift Changes in Leakage Current What it means: The phase angle between voltage and leakage current shifts — especially the third harmonic. Used in: Online monitoring systems. Why it matters: Indicates the balance between capacitive and resistive components is shifting unfavourably. 6. Leakage Current under Wet Conditions What it means: If leakage current increases dramatically during rain or fog, it may indicate surface tracking or contamination. Action: Cleaning or replacing the arrester may be required. 05 Which standard is most widely accepted worldwide? The IEC 60099-4 standard (from the International Electrotechnical Commission) is the most widely accepted global standard for metal-oxide lightning arresters. It defines performance criteria, testing procedures—including online monitoring methods—and requirements for high-voltage arresters used in power systems. The B2 method for assessing leakage current in metal-oxide surge arresters is detailed in the IEC 60099-4 standard — specifically in IEC 60099-4:2013, titled "Surge arresters — Part 4: Metal-oxide surge arresters without gaps for AC systems — Methods of test". This standard outlines how to measure and analyze leakage current components, including the resistive part used in the B2 method, for condition assessment and online monitoring of high-voltage lightning arresters. 06 Do you know Which parameter are measured in IEC 60099-4 B2 Method ? In the B2 method, leakage current measurement is used to evaluate the condition of a metal-oxide lightning arrester by analyzing its resistive (non-capacitive) leakage current component while the arrester is energized at operating voltage. Here’s how it works: Measurement: The total leakage current flowing through the arrester is measured using sensitive instruments. This current consists of a capacitive component (normal and stable) and a resistive component (indicative of arrester aging or damage). Resistive component isolation: The B2 method focuses on isolating the resistive part of the leakage current, as an increase in resistive current usually signals degradation, moisture ingress, or damage to the arrester’s internal varistors. Analysis: By comparing the measured resistive leakage current to baseline or manufacturer’s reference values, the condition of the arrester can be assessed. A rising resistive leakage current over time indicates deteriorating insulation and the potential for failure. Trend monitoring: Periodic measurements allow trend analysis, helping predict the arrester’s remaining life and plan maintenance before catastrophic failure occurs. This method is widely used because it is sensitive, non-invasive, and can be performed online without disconnecting the arrester. 07 Which compensations are taken care in B2 method typically In the B2 method, leakage current measurement is used to evaluate the condition of a metal-oxide lightning arrester by analyzing its resistive (non-capacitive) leakage current component while the arrester is energized at operating voltage. Here’s how it works: Measurement: The total leakage current flowing through the arrester is measured using sensitive instruments. This current consists of a capacitive component (normal and stable) and a resistive component (indicative of arrester aging or damage). Resistive component isolation: The B2 method focuses on isolating the resistive part of the leakage current, as an increase in resistive current usually signals degradation, moisture ingress, or damage to the arrester’s internal varistors. Analysis: By comparing the measured resistive leakage current to baseline or manufacturer’s reference values, the condition of the arrester can be assessed. A rising resistive leakage current over time indicates deteriorating insulation and the potential for failure. Trend monitoring: Periodic measurements allow trend analysis, helping predict the arrester’s remaining life and plan maintenance before catastrophic failure occurs. This method is widely used because it is sensitive, non-invasive, and can be performed online without disconnecting the arrester.

SF6 gas analyser KPM KS30 , finds SF6 purity：0~100% & SF6 decomposition products such as ： SO2, H2S, HF,CO etc. ÉQUIPEMENT D'ESSAI DE GAZ SF6 (GIS) Analyseur de gaz SF6 Spécifications techniques -: 1. Pureté SF6：0~100% SF6（rapport pondéral）； 2. Produits de décomposition du SF6： 1.SO2： 0~200ppm； 2.H2S： 0～200ppm； 3.HF： 0～10ppm； 4.CO ：0 ～ 1000ppm； 3. Précision de mesure a) Pureté SF6：±0.1%，sans rapport avec le débit； b) Produits de décomposition SF6：0.1ppm； 4) Temps de réponse a) Pureté SF6：30s； b) Produits de décomposition SF6：10~15s。 Contactez-nous Compteur de point de rosée SF6 (KPM DPM-01) Largement utilisé dans les ateliers, bureaux, usines, postes informatiques, laboratoires et entrepôts. Le compteur de point de rosée portatif KPM-DPM-82H est utilisé pour les applications de vérification ponctuelle et l'étalonnage sur le terrain. Il offre une mesure précise et rapide pour les applications de point de rosée industrielles, telles que l'air comprimé, le gaz Sf6, _cc781905 -5cde-3194-bb3b-136bad5cf58d_traitement des métaux, fabrication additive ainsi que séchage des aliments et des plastiques. Avantages- : Accurate measurement & temps de mesure rapide. L'affichage numérique donne une lecture exacte avec un minimum d'erreur Large plage de mesure et haute résolution. Les dernières valeurs / Max. Valeurs / Min. Valeurs de L'humidité et la température seront automatiquement stockées dans la mémoire et peuvent être affichées. L'utilisation de composants durables et durables, y compris un boîtier en plastique ABS solide et léger, garantit des performances sans entretien pendant de nombreuses années. Le boîtier a été soigneusement conçu pour tenir confortablement dans chaque main. Contactez-nous Compteur de point de rosée SF6 (KPM DPM-01) Spécifications techniques -: KPM-DPM-01 adopte un capteur d'humidité capacitif à film importé et une technologie de micro-ordinateur. It est développé comme un instrument de mesure de trace d'humidité intelligent avec de bonnes performances. Son fonctionnement est simple et il a la fonction de conversion entre Td, RH, PPM et mise à jour logicielle. Le détecteur peut être utilisé dans les tests d'humidité de l'air, y compris l'air, l'azote, les gaz inertes et tout air ne contenant pas de milieu corrosif, en particulier le test d'humidité de l'air SF6. Caractéristiques Auto-calibrage du point zéro et de la pente après le démarrage, calibrage du point de rosée par point unique pour la gamme complète (technologie brevetée) Conception unique du circuit de gaz, bonne étanchéité et perméabilité au gaz, résistance à l'eau. Le grand écran TFT à cristaux liquides affiche la valeur du point de rosée et le pourcentage d'humidité relative correspondant Valeur d'humidité, valeur d'humidité PPM Stockage et interrogation des données de mesure Invite d'alimentation intelligente, protection de charge intelligente La batterie au lithium offre une longue veille d'alimentation Contactez-nous Foire aux questions (FAQ) FAQ about SF6 GAS testing : 01 Is SF6 Gas Testing: Health, Safety, and Environmental Implications? Sulfur hexafluoride (SF₆) is widely used as an insulating and arc-quenching gas in high-voltage switchgear due to its excellent dielectric properties. However, SF₆ is a potent greenhouse gas, with a global warming potential over 23,000 times that of CO₂. Hence, rigorous testing and handling are essential for environmental compliance and personnel safety. Key SF₆ tests include moisture content, purity, and decomposition products (like SO₂ and HF), which help detect gas leakage, contamination, or insulation failure. Exposure to decomposition byproducts can pose health hazards such as respiratory irritation or chemical burns, necessitating strict handling protocols and personal protective equipment (PPE). KPM offers advanced SF₆ gas analyzers that measure purity, moisture, and decomposition gases in accordance with IEC 60376 and 60480 standards. With portable, user-friendly designs and accurate sensors, KPM’s instruments support safe operation, environmental responsibility, and preventive maintenance of gas-insulated systems. 02 What Is a Dew Point Meter and Why Is It Essential for SF6 Systems? A dew point meter is a device that measures the dew point, the temperature at which air becomes saturated and water vapour condenses into liquid water. In SF6 (sulfur hexafluoride) systems, dew point meters are crucial for monitoring moisture levels, as even small amounts of water can lead to hydrolysis, forming corrosive byproducts like hydrofluoric acid, which damage insulation and metal components. Excess moisture can also reduce the dielectric strength of SF₆, increasing the risk of flashovers and system failures. Regular dew point monitoring ensures that SF₆ gas remains dry and stable, extending the lifespan of high-voltage equipment like GIS (Gas Insulated Switchgear). KPM's Dew Point Meters provide fast, accurate, and reliable measurements, with robust sensors designed for field and laboratory use. These meters help utilities maintain safety, reliability, and regulatory compliance, making them an essential part of preventive maintenance in SF₆ systems. 03 What is PQ analyzer , how it is different than Power recorders ? A Power Quality Analyzer and a Power Recorder may appear similar at first glance, but they serve distinct purposes in electrical diagnostics and monitoring. A Power Quality Analyzer is specifically designed to detect, analyze, and troubleshoot disturbances in the power system such as voltage sags, swells, transients, harmonics, flicker, unbalance, and frequency deviations. These analyzers are equipped with high-speed sampling capabilities, waveform capture, and harmonic spectrum analysis tools, making them ideal for identifying and resolving issues that can affect the performance or lifespan of sensitive electrical equipment. They are also commonly used for compliance monitoring against standards like EN 50160 or IEEE 519. In contrast, a Power Recorder is primarily used for long-term logging of power parameters such as voltage, current, power (kW, kVA, kVAR), and energy consumption. Its focus is more on load studies, energy audits, and identifying usage patterns over time rather than real-time disturbances or quality issues. Power Recorders usually measure and log RMS values at set intervals and are not typically equipped to detect fast transients, harmonics, or waveform-level events. While some overlap exists—many modern Power Quality Analyzers also offer recording functionality—the key difference lies in the depth of analysis. A Power Quality Analyzer is a diagnostic tool used when there’s a suspected problem or for verifying power quality compliance, whereas a Power Recorder is more of a monitoring tool for tracking energy use and system loading trends over time. 04 How Harmonics Affect Transformer Performance? Effects of Harmonics on Transformer Performance Increased Heating (Core and Copper Losses): Harmonics cause additional eddy current and hysteresis losses in the transformer core and I²R losses in the windings due to the skin effect and proximity effect. This leads to excessive heating, even when the transformer is operating within its rated current. This can reduce transformer lifespan or even cause thermal failure. Reduced Efficiency: As harmonic losses increase, the overall efficiency of the transformer drops. It may appear to be operating under normal conditions in terms of RMS values, but real power losses are higher. Derating of Transformer: To compensate for the increased losses due to harmonics, transformers are often derated (i.e., used at less than their nameplate capacity) when supplying non-linear loads. IEEE Std C57.110 provides guidelines for calculating the required derating. Increased Vibration and Noise: Harmonics can cause magnetostriction effects in the transformer core, resulting in audible noise and mechanical vibration, which can be especially problematic in sensitive environments. Insulation Stress and Aging: Repeated thermal cycling due to harmonic-induced heating stresses the insulation system, accelerating insulation degradation and reducing transformer life expectancy. Neutral Overload (in 3-phase systems): In systems with significant triplen harmonics (3rd, 9th, 15th...), these components add arithmetically in the neutral conductor. This can cause the neutral to overheat, even if the phase conductors are within limits. Incorrect Protective Relay Operation: Harmonic distortion can interfere with current and voltage sensing used in protective relays, leading to nuisance tripping or failure to trip during faults. 05 What are Real-World Applications of PQ Recorders? Real-World Applications of Power Quality (PQ) Recorders 1. Load Profiling and Energy Audits PQ recorders are commonly used to monitor energy consumption patterns over time. This helps identify peak demand periods, base loads, and inefficiencies, supporting energy optimization and cost savings. 2. Electrical System Commissioning During commissioning of new installations—such as switchboards, transformers, or generators—PQ recorders verify voltage levels, current balance, and overall system performance to ensure proper operation. 3. Capacity Planning and Expansion Before adding new electrical loads, PQ recorders assess whether existing infrastructure can support the additional demand. This prevents overloading and supports informed upgrade decisions. 4. Renewable Energy Integration In solar and wind power systems, PQ recorders monitor output stability, voltage, and frequency to ensure grid compliance and smooth integration with the main supply. 5. Troubleshooting Intermittent Issues When power issues such as flickering, nuisance tripping, or undervoltage occur, PQ recorders help log and analyze events that may not be immediately visible during spot checks. 6. Utility Billing Verification PQ recorders provide accurate data for verifying utility charges, particularly demand-based billing and power factor penalties, helping avoid disputes or overcharges. 7. Temporary Power Monitoring For construction sites, events, or mobile power setups, PQ recorders ensure temporary supplies are stable, safe, and suitable for operational requirements. 8. Preventive Maintenance and Trend Analysis Long-term monitoring enables early detection of issues like increasing unbalance or loading trends, allowing for proactive maintenance before failures occur. 06 What are the Benefits of 24/7 Power Quality Monitoring? Benefits of 24/7 Power Quality Monitoring : 1. Continuous Visibility Real-time tracking of voltage, current, harmonics, and disturbances ensures you always have a clear picture of system health — without waiting for issues to escalate. 2. Early Fault Detection Continuous monitoring helps detect developing issues like transformer overload, harmonic distortion, or voltage imbalance before they cause damage or downtime. 3. Minimizes Unplanned Downtime By identifying power disturbances early, 24/7 PQ monitoring reduces the risk of equipment failure, production loss, or service interruption. 4. Improves Equipment Lifespan Stable power quality reduces stress on motors, drives, UPS systems, and sensitive electronics — extending their service life and reducing maintenance costs. 5. Supports Root Cause Analysis Historical event logs and waveform captures make it easier to trace the cause of faults, helping engineers respond faster and more accurately. 6. Compliance & Reporting Automated recording helps meet regulatory standards (e.g., EN 50160, IEEE 519) and supports internal audits or external quality reports. 7. Energy Efficiency Optimization By continuously monitoring power factor, load balance, and harmonic content, users can implement corrective actions to reduce losses and improve system efficiency. 8. Informs Investment Decisions Reliable long-term data helps justify infrastructure upgrades, sizing of backup systems, or addition of filters and stabilizers.

All type of electrical testing and commissioning services Services de test Test et mise en service Essais et mise en service de tous Panneaux LV / HV / UHV Appareillages Plusieurs sous-stations intérieures et extérieures Station isolée au gaz [GIS] dans la plage de tension de 400V - 765KV Générateurs MT/BT Transformateurs de puissance Moteurs Banques de condensateurs Réacteurs Câbles Isolateurs Parafoudres CT, PT, CVT, Disjoncteurs NG, NGT, panneaux de contrôle et de relais pour générateur, Coupleur FBus, transfert de bus et contrôle de ligne, etc. Renseignez-vous Surveillance Capacité et Tan Delta Analyse de réponse en fréquence de balayage [SFRA] Décharge partielle Détection d'imperfection de noyau électromagnétique [ELCID] Déviation de coin Test RSO Comparaison des surtensions Test DC Hi-Pot, résistance d'isolement, indice de polarisation. Renseignez-vous

KPM Solutions|Point to Point QUESTION AND ANSWERS FOR ELECTRICAL TESTING EQUIPMENT , TAN DELTA , RELAY TEST KIT , CT PT ANALYZER , LATESTER , OIL BDV ETC. |FREQUENTLY ASKED QUESTIONS | |FAQ |https://www.kpmtek.com/faq Foire aux questions (FAQ) 01 What is the purpose of battery utility testing in backup power systems? Battery utility testing ensures the reliability, health, and performance of backup power systems used in utilities, substations, data centers, and critical infrastructure. Over time, batteries degrade due to factors like temperature, charge-discharge cycles, and age. Testing helps detect early signs of failure such as increased internal resistance, reduced capacity, or imbalance among cells. This enables timely maintenance or replacement, preventing unexpected power loss during outages. Utility testing validates whether batteries meet required discharge durations and ensures compliance with standards like IEEE 450 or IEC 60896. Regular testing minimizes downtime, enhances operational safety, and protects expensive downstream equipment. KPM provides advanced battery analyzers and constant current discharge kits designed for utility-scale battery banks. These instruments measure internal resistance, voltage, and capacity under load conditions. KPM’s systems are aligned with international testing standards and are used by utilities to perform periodic health checks, identify weak cells, and ensure uninterrupted power backup readiness. 02 1. What is VLF testing, and why is it used for cable diagnostics? VLF (Very Low Frequency) testing applies a low-frequency AC voltage—typically 0.01 Hz to 0.1 Hz—to power cables to assess their insulation condition. It’s used because VLF testing can apply a high voltage stress similar to normal operating conditions but with less heating and damage risk than standard power frequency tests. This makes it ideal for diagnosing medium- and high-voltage cables, especially in field conditions, to detect weaknesses like insulation degradation, voids, or defects before failure occurs. 03 How to Perform a Reliable 10kV Insulation Test? A 10kV insulation resistance test is used to evaluate the dielectric strength of high-voltage equipment like transformers, motors, and cables. To perform it reliably, first de-energize and isolate the equipment, ensuring it's properly grounded. Clean terminals to remove surface contamination. Connect the insulation tester leads: One to the conductor and the other to ground. Select the 10kV test voltage on the insulation resistance tester. Begin the test and monitor resistance for 1 to 10 minutes—longer durations help identify moisture or insulation defects. Readings should be in the GΩ (giga ohm) range for healthy insulation. Apply DAR (Dielectric Absorption Ratio) or PI (Polarization Index) analysis to assess insulation aging. Ensure environmental conditions are dry and free of electrical noise for accuracy. KPM provides high-voltage insulation testers with digital displays, timer functions, and built-in safety features, ensuring accurate, safe, and standards-compliant insulation testing across utility and industrial applications. 04 Qu'est-ce qu'un kit de test de relais ? Un kit de test de relais est un équipement utilisé pour tester différents types de relais. Le kit de test de relais est une combinaison de sources de courant et de tension programmables et d'une minuterie. Pendant le test de relais Le kit de test de relais injecte un défaut dans le relais (sous forme de CT & PT) et mesure le temps de déclenchement ou le temps de réaction du relais. Si le comportement du relais est conforme à ses paramètres, le relais réussit le test, sinon le relais échoue au test. 05 Is SF6 Gas Testing: Health, Safety, and Environmental Implications? Sulfur hexafluoride (SF₆) is widely used as an insulating and arc-quenching gas in high-voltage switchgear due to its excellent dielectric properties. However, SF₆ is a potent greenhouse gas, with a global warming potential over 23,000 times that of CO₂. Hence, rigorous testing and handling are essential for environmental compliance and personnel safety. Key SF₆ tests include moisture content, purity, and decomposition products (like SO₂ and HF), which help detect gas leakage, contamination, or insulation failure. Exposure to decomposition byproducts can pose health hazards such as respiratory irritation or chemical burns, necessitating strict handling protocols and personal protective equipment (PPE). KPM offers advanced SF₆ gas analyzers that measure purity, moisture, and decomposition gases in accordance with IEC 60376 and 60480 standards. With portable, user-friendly designs and accurate sensors, KPM’s instruments support safe operation, environmental responsibility, and preventive maintenance of gas-insulated systems. 06 What are the Top 5 PD Testing Techniques – A Quick Comparison? 1) Ultrasonic PD Detection - Detects sound waves from PD events - Portable, good for on-site inspections - Limited sensitivity in noisy environments 2) High-Frequency Current Transformer (HFCT) - Measures high-frequency currents on cables - Effective for early PD detection - Requires access to grounding points 3) Transient Earth Voltage (TEV) - Detects electromagnetic signals from PD inside metal enclosures - Non-intrusive and widely used in switchgear - Limited for external PD sources 4) Oscilloscopic PD Measurement - Directly captures PD pulses using specialized sensors - Very detailed and accurate - Requires expert analysis and controlled environment 5) Acoustic Emission (AE) Sensors - Captures elastic waves from PD activity - Useful for localizing PD sources - Can be affected by external noise - KPM offers advanced PD measurement systems combining multiple techniques for comprehensive, reliable diagnostics. 07 Difference between Clamp and Spike Method? Earth Resistance Testing: Clamp vs. Spike Method : The Clamp Method and the Spike (Fall-of-Potential) Method are two commonly used techniques for measuring earth resistance, each with distinct use cases. The Spike Method (also known as the three-point or fall-of-potential method) is considered the most accurate and is typically used during installation or scheduled maintenance when it’s feasible to disconnect the grounding system. It requires driving two auxiliary spikes into the ground at set distances from the earth electrode and measuring the voltage drop created by a test current. This method provides a true earth resistance value but is time-consuming, invasive, and requires open ground access. In contrast, the Clamp Method (or Stakeless method) is a quick, non-intrusive test ideal for live systems where disconnecting the earth rod is not possible. Using a special clamp meter, the method induces a test signal and measures current flow through parallel earth paths. It’s convenient and fast but is only applicable when multiple grounding paths exist (e.g., in mesh or grid systems). The Clamp Method does not provide accurate results for isolated earth rods or when there is only a single grounding point. In summary, the Spike Method is best for accurate baseline testing during commissioning, while the Clamp Method is ideal for routine checks on operational systems without disrupting service. 08 What is the purpose of reference testing in energy meter calibration? The purpose of reference testing in energy meter calibration is to verify and ensure the accuracy of the energy meter by comparing its measurements against a highly precise and traceable standard—called the reference meter or standard. This process identifies any measurement errors or deviations in the energy meter under test, allowing for correction or adjustment to meet specified accuracy classes. Reference testing helps maintain measurement reliability, billing fairness, and compliance with industry standards. 09 How to Test a Li-ion Battery Pack Safely and Efficiently ? Testing a Li-ion battery pack requires a balance of safety, accuracy, and efficiency. Key steps include: Visual Inspection: Check for swelling, leakage, or damaged terminals. Voltage Check: Measure open-circuit voltage to ensure cells are within the safe range. Insulation Resistance Test: Verify electrical isolation between terminals and the battery casing. Capacity & Discharge Testing: Simulate real-world loads to assess actual capacity, energy output, and discharge efficiency. Impedance/IR Testing: Identify aging cells or weak connections. Thermal Monitoring: Monitor temperature rise during charging/discharging to detect potential overheating. Safety tips include using proper PPE, short-circuit protection, and ventilated areas to avoid thermal events. KPM's Battery Pack Tester is designed for safe and efficient testing of EV and industrial Li-ion packs. It offers automated test sequences, multi-channel voltage/current monitoring, and integrated thermal protection. The tester's real-time data logging and analysis software help ensure accurate diagnostics, preventive maintenance, and safer battery operation. 10 Why Timing Tests on Circuit Breakers Matters ? During a circuit breaker timing test, the opening and closing times of main and auxiliary contacts are measured to assess the breaker's mechanical and electrical performance. The test simulates real fault or operation conditions, records response times (e.g., O, C, O-C-O), and analyzes contact synchronization, bounce, and trip coil current. These measurements reveal issues like slow operation, wear, or misalignment. Advantages include early fault detection, improved safety, reduced downtime, and compliance with IEC/ANSI standards. KPM offers precise timing test equipment with advanced diagnostics, helping utilities and industries maintain system reliability and extend breaker life through data-driven maintenance planning. 11 What is the purpose of online testing for lightning arresters? The purpose of online testing for HV lightning arresters is to evaluate their health and operational condition while they remain energized and connected to the high-voltage system. This non-intrusive testing monitors critical parameters—especially leakage current—to detect early signs of insulation degradation, moisture ingress, or internal damage. By performing these tests without disconnecting the arrester, utilities can ensure continuous protection against transient over voltages, prevent unexpected failures, and schedule maintenance proactively, thereby enhancing system reliability and safety. 12 What is the use of online partial discharge (PD) monitoring of panels using TEV and contact ultrasonic methods? Online partial discharge monitoring of medium-voltage and high-voltage panels using TEV (Transient Earth Voltage) and contact ultrasonic methods is used to detect and localize internal insulation defects and surface discharges without shutting down the equipment. Here's how each method contributes: 1. TEV (Transient Earth Voltage) Method Use: Detects internal PD activity, especially within air-insulated switchgear (AIS) and cable terminations inside metal-clad panels. How it works? When PD occurs inside enclosed metal-clad gear, it emits fast-rising electromagnetic pulses that induce transient voltages on the metal surfaces. TEV sensors pick up these signals from outside the panel. Benefit: Non-invasive, detects internal voids, tracking, and corona effects. 2. Contact Ultrasonic Method Use: Detects surface discharges, such as corona or tracking, which emit high-frequency acoustic signals. How it works? A piezoelectric sensor placed on the panel surface detects ultrasonic noise generated by PD activity, even through the enclosure. Benefit: Helps locate poor insulation, loose connections, or contamination issues causing discharge on the surface. Combined Use – Why It Matters? Using both TEV and ultrasonic methods together enhances diagnostic accuracy: TEV gives insight into internal discharge severity and location. Ultrasonic confirms surface or near-surface PD sources and allows cross-verification. This dual-method approach is vital for: Preventive maintenance, Avoiding insulation failures, Improving switchgear reliability, and Extending equipment life without needing shutdowns. 13 Metalworking & Fabrication Machinery :- Top German/European Brands: DMG MORI (Germany/Japan) – CNC turning/milling centers . TRUMPF (Germany) – Laser cutting, bending machines . EMAG, INDEX, GILDEMEISTER – Lathes, turn-mill centers . Bystronic (Switzerland) – Sheet metal and laser cutting. Amada (Europe) – Press brakes, punching systems Request form 14 Differences Between 5kV, 10kV, and 15kV Insulation Testers? The main difference between 5kV, 10kV, and 15kV insulation testers lies in their test voltage output, which determines the type of equipment they are suited for and the depth of insulation assessment they provide. 5kV testers are typically used for low to medium voltage equipment like motors, cables, and switchgear up to 25kV. 10kV testers are suitable for higher-voltage systems such as power transformers, HV motors, and cables rated up to 69kV, providing a deeper insulation profile. 15kV testers are used for critical high-voltage assets above 69kV, enabling detection of insulation weaknesses that lower voltages may miss. Higher voltage testers stress insulation more, revealing latent defects and moisture absorption. However, using too high a voltage on low-rated equipment can cause damage. KPM offers 5kV, 10kV, and 15kV insulation testers with digital readings, polarization index (PI), and DAR calculations, ideal for field diagnostics and predictive maintenance. 15 How does online testing differ from offline testing of lightning arresters? Online testing of lightning arresters is performed while the arrester is energized and connected to the live high-voltage system. It monitors parameters like leakage current and voltage in real time to assess the arrester’s condition without interrupting power supply or removing the arrester from service. Offline testing, on the other hand, requires disconnecting the arrester from the system and applying controlled test voltages or impulses in a laboratory or test environment. This allows detailed diagnostic tests, such as insulation resistance, dielectric withstand, and energy absorption capability, but causes downtime and power disruption. In summary, online testing enables continuous condition monitoring without service interruption, while offline testing offers more comprehensive diagnostics but requires taking the arrester out of operation. 16 2. How does VLF testing differ from conventional AC hipot testing? VLF testing uses a very low frequency (typically 0.01 to 0.1 Hz) AC voltage, whereas conventional AC hipot testing applies standard power frequency (50/60 Hz) voltage. The low frequency in VLF reduces the capacitive charging current in long cables, allowing high test voltages without overheating the cable insulation. This makes VLF safer and more practical for field testing of long medium- and high-voltage cables. In contrast, conventional AC hipot tests can cause excessive heating and damage when used on such cables. 17 What are the Top 5 Mistakes to Avoid While Discharging Lithium-Ion Cells ? Discharging lithium-ion cells must be done with precision to avoid safety risks and performance degradation. Here are the top 5 mistakes to avoid: 1. Over-Discharging Below Safe Voltage Limits: Going below 2.5–3.0V can cause irreversible damage or capacity loss. 2. High Current Discharge Without Monitoring: Excessive current leads to overheating, thermal runaway, or cell swelling. Always follow rated discharge current. 3. Ignoring Cell Balancing: Uneven discharge across cells in a pack can reduce lifespan or cause imbalance-related failures. 4. Lack of Temperature Monitoring: Not monitoring temperature during discharge can hide thermal issues that lead to fires or failure. 5. Discharging Without Load Control or Cut-Off Logic: Manual discharge setups without auto cut-off risk cell damage or safety hazards. KPM’s Battery Tester prevents these issues through programmable discharge profiles, auto cut-off, real-time voltage/current/temperature monitoring, and cell balancing diagnostics. It ensures safe, accurate discharge testing for EVs, storage systems, and R&D applications. 18 What Is a Dew Point Meter and Why Is It Essential for SF6 Systems? A dew point meter is a device that measures the dew point, the temperature at which air becomes saturated and water vapour condenses into liquid water. In SF6 (sulfur hexafluoride) systems, dew point meters are crucial for monitoring moisture levels, as even small amounts of water can lead to hydrolysis, forming corrosive byproducts like hydrofluoric acid, which damage insulation and metal components. Excess moisture can also reduce the dielectric strength of SF₆, increasing the risk of flashovers and system failures. Regular dew point monitoring ensures that SF₆ gas remains dry and stable, extending the lifespan of high-voltage equipment like GIS (Gas Insulated Switchgear). KPM's Dew Point Meters provide fast, accurate, and reliable measurements, with robust sensors designed for field and laboratory use. These meters help utilities maintain safety, reliability, and regulatory compliance, making them an essential part of preventive maintenance in SF₆ systems. 19 What do you understanding AE, HFCT, TEV, and UHF – Which PD Kit Do You Need? Choosing the right Partial Discharge (PD) testing kit depends on your equipment type, accessibility, and testing goals. Here’s a quick comparison: 1. AE – Acoustic Emission How it works: Detects sound waves from PD using piezoelectric sensors. Best for: Transformers, bushings, and GIS (localizing PD points). Pros: Non-invasive, good for pinpointing PD. Limitations: Sensitive to external noise. 2. HFCT – High-Frequency Current Transformer How it works: Clamped around the grounding conductor to detect PD pulses. Best for: Cables, terminations, rotating machines. Pros: Early detection, non-intrusive. Limitations: Needs grounding access; less effective in noisy ground systems. 3. TEV – Transient Earth Voltage How it works: Senses electromagnetic emissions on metal-clad switchgear. Best for: MV switchgear (metal-enclosed). Pros: Easy to use, fast screening. Limitations: Doesn’t work well on non-metallic enclosures. 4. UHF – Ultra High Frequency How it works: Captures high-frequency EM waves from PD (300 MHz+). Best for: GIS, gas-insulated transformers, sealed systems. Pros: Very sensitive and noise-immune. Limitations: Needs access to UHF sensors or couplers. Which Kit Do You Need? For switchgear: TEV + AE For cables and rotating machines: HFCT For GIS or sealed systems: UHF + AE For transformers and bushings: AE + HFCT KPM offers hybrid PD testing kits combining AE, TEV, HFCT, and UHF sensors for complete diagnostics across all asset types—helping you localize, classify, and trend PD activity efficiently. 20 What safety precautions must be taken during battery testing? Battery testing involves handling high voltages, currents, and hazardous chemicals, so strict safety precautions are essential. Always wear appropriate personal protective equipment (PPE) such as insulated gloves, eye protection, and flame-resistant clothing. Ensure proper ventilation, especially for lead-acid batteries that emit hydrogen gas during charging or discharging. Isolate the battery bank from the load before testing, and use insulated tools to prevent short circuits. Verify polarity before connecting test equipment to avoid damage or sparking. Never allow metal objects near open battery terminals. Maintain safe distances and use warning signs during high-current discharge tests. Monitor temperature rise and terminate testing if overheating or voltage instability is observed. Follow the manufacturer’s guidelines and applicable standards (IEEE, IEC) during every procedure. KPM’s battery analyzers and discharge testers are equipped with multiple safety features such as overcurrent protection, reverse polarity alarms, thermal cutoffs, and auto-shutdown. KPM also provides user training and safety documentation to ensure proper and secure operation. 21 How to Ensure Compliance With Earth Testing in Renewable Sites? Ensuring Compliance with Earth Testing in Renewable Sites : To ensure safety and meet regulatory standards in solar, wind, or hybrid renewable energy systems, proper earth resistance testing is essential. Key Steps: Follow Standards: Comply with IEC 60364, IEEE 80, BS 7430, or local codes. Test Soil Early: Conduct soil resistivity surveys during design to select the right grounding method. Use Proper Methods: Apply the Fall-of-Potential method for commissioning and Clamp Method for periodic checks. Keep Records: Log all test data with method, instrument, and environmental details. Test Regularly: Schedule annual or biannual resistance tests to catch degradation early. Use Remote Monitoring (if available): SCADA or sensors can track resistance levels continuously. Train Personnel: Ensure field staff know correct testing procedures and safety protocols. Third-Party Verification: For audits or large projects, use certified inspectors for compliance reporting. 22 How is the accuracy class of an energy meter determined during calibration? The accuracy class of an energy meter is determined by evaluating its measurement error under a range of standardized test conditions during calibration. This involves comparing the meter’s energy readings against those of a highly accurate reference standard meter over a set period and at various load levels and power factors. The calibration process typically tests the meter at multiple points such as: Light load (e.g., 10% of rated current) Medium load (e.g., 50% of rated current) Full load (100% of rated current) Additionally, measurements are taken at different power factors, including unity (1.0), lagging (inductive), and leading (capacitive) conditions, to simulate real operating scenarios. At each test point, the percentage error is calculated by comparing the meter’s recorded energy to that of the reference meter. The accuracy class is assigned based on whether these errors stay within the maximum allowable limits defined by standards such as IEC 62053 or ANSI C12.20. For example, a Class 1.0 meter must not exceed ±1% error under these conditions. Consistent performance across all test points confirms the meter’s accuracy class, ensuring it meets the required precision for billing or monitoring applications. 23 What means measuring contact resistance in Circuit Breakers ? A contact resistance test measures the electrical resistance across closed contacts of a circuit breaker. Low resistance ensures efficient current flow with minimal losses or overheating. High resistance can indicate pitting, corrosion, or poor contact pressure. This test helps detect internal issues not visible externally. It’s essential for preventing energy losses, overheating, and eventual failure during load or fault conditions. Regular testing ensures optimal breaker performance, safety, and longevity. KPM offers contact resistance test equipment with high accuracy and data logging, enabling predictive maintenance, faster troubleshooting, and compliance with IEC/IEEE standards across substations and industrial power systems. 24 Plastic & Rubber Processing Machines :- Top Brands: ARBURG (Germany) – Injection moulding. ENGEL (Austria) – Injection moulding. KRAUSSMAFFEI (Germany) – Plastic & rubber machines DEMAG Plastics Group – Injection moulding. BOY (Germany) – Compact moulding machines. Request form 25 Pourquoi les kits de test de relais automatiques sont-ils préférés aux kits de test de relais traditionnels (à base de variac) ? Les kits de test de relais automatiques présentent divers avantages par rapport aux enfants traditionnels 1. Stabilité du signal : la sortie du courant et de la tension de sortie du kit de test de relais automatique n'est pas proportionnelle à son alimentation d'entrée, cela signifie que la sortie de courant et de tension du kit de test de relais est alimentée d'analogique à numérique, puis de conversion numérique à analogique soutenue par un boucle de rétroaction, les signaux de sortie du kit de test de relais ne dépendent donc pas de son alimentation d'entrée. La sortie du kit de test de relais automatique est stable même s'il y a une instabilité mineure dans l'alimentation d'entrée 2. Précision, résolution et fonctionnalité : avec les kits de test de relais automatiques, l'utilisateur peut faire varier la fréquence de phase et l'amplitude de tous les signaux de courant et de tension indépendamment avec une résolution et une précision très élevées. Ce n'est pas possible dans les kits d'injection secondaire traditionnels qui peuvent augmenter ou varier uniquement l'amplitude (V ou I) à l'aide d'un variac manuel. 26 Qu'est-ce qu'un kit de test de relais numérique ? Le kit de test de relais numérique est un autre nom pour les kits de test de relais automatiques ou basés sur un microprocesseur. Relais numériques généralement de haute précision qui peuvent être testés avec des kits de test de relais automatiques de haute précision 27 What is principle of detecting PD in Switchgear Using TEV Method ? The Transient Earth Voltage (TEV) method detects partial discharge activity in metal-clad switchgear by capturing fast, high-frequency voltage transients that appear on the internal metal surfaces of the switchgear enclosure. How It Works: When partial discharge occurs inside the insulation of live parts (e.g., busbars, bushings), it emits electromagnetic pulses. These pulses induce high-frequency voltage transients on the inner surface of the switchgear's metal enclosure. These transients propagate through the metal, eventually reaching the outer surface. A TEV sensor, placed magnetically or capacitively on the metal surface, detects these transient voltages—typically in the range of MHz frequencies. Why It Works Well for Switchgear: Switchgear panels are metal-enclosed, which acts as a waveguide for the transient signals. TEV signals indicate internal insulation defects like surface tracking, void discharges, or corona inside the equipment. TEV detection is non-invasive, requires no shutdown, and is widely used for condition-based maintenance. What TEV Tells You: Presence of internal PD Severity of the discharge (by amplitude and repetition rate) Useful for early detection before insulation failure KPM’s PD testing kits integrate TEV sensors with digital displays and trending software, making it easy to perform on-site diagnostics of medium-voltage switchgear for early PD detection and risk assessment. 28 Why Cell Balancing is Critical in Battery Pack Design? Cell balancing is essential in lithium-ion battery pack design to ensure uniform voltage levels across all cells, which directly impacts performance, safety, and lifespan. Without balancing, even a single weak or overcharged cell can cause: Reduced usable capacity Premature degradation or failure Overheating or thermal runaway False full/empty readings during charging/discharging There are two types: 1. Passive balancing dissipates extra energy as heat and 2. Active balancing redistributes charge to weaker cells, improving efficiency KPM’s Battery Solution features integrated smart cell balancing technology. It continuously monitors each cell’s voltage and automatically adjusts charge levels to maintain uniformity. Whether in EVs, solar storage, or industrial packs, KPM’s system ensures balanced charging/discharging, enhanced cycle life, and optimal safety. The real-time monitoring interface also provides visual alerts on imbalance conditions—enabling proactive maintenance and higher reliability. 29 What is Karl Fischer Titration ? Explain Moisture Testing in Oil. Karl Fischer (KF) titration is a precise chemical method used to measure moisture content (water) in substances, including insulating oils, with accuracy down to parts per million (ppm). It's the preferred method for transformer oil and lubricants because even trace moisture can degrade dielectric strength, cause corrosion, or affect equipment performance. How It Works: KF titration is based on a chemical reaction where iodine reacts with water in the presence of sulfur dioxide and alcohol, using a base (often imidazole or pyridine) as a catalyst: This reaction occurs until all water is consumed. The amount of iodine used is directly proportional to the moisture present. Types of KF Titration: Volumetric KF: For water content above 1%. Common in oil testing. Coulometric KF: For ultra-low moisture (<1%), generating iodine electrochemically. Advantages: Highly accurate (1–10 ppm range). Specific to water (no interference from other volatiles). Widely accepted in ASTM D1533 for transformer oil testing. KPM supplies Karl Fischer titrators for both volumetric and coulometric methods, used in power utilities and oil testing labs to ensure insulation oils remain within safe moisture limits. 30 What is the use of both side ground feature in contact resistance meter ? The both-side ground feature in a contact resistance meter allows the tester to connect the instrument’s ground reference on both ends of the circuit breaker contacts simultaneously. For Example:- - Eliminate interference and noise caused by stray currents or electromagnetic fields. - Improve measurement accuracy by ensuring a stable, low-resistance ground path. - Prevent false readings that may occur if only one side is grounded. - It increases the safety of the operation. - KPM’s contact resistance meter CRT 200 G use this feature to deliver precise, repeatable readings critical for assessing contact health and ensuring reliable breaker operation. 31 What will be seasonal Impact on Ground Resistance Measurements? Seasonal Impact on Ground Resistance Measurements Ground resistance values can vary significantly with seasonal changes due to environmental factors affecting soil conditions: Soil Moisture: During wet seasons (rainy or winter), soil moisture increases, lowering ground resistance by improving conductivity. Conversely, dry seasons cause soil to dry out, increasing resistance. Soil Temperature: Colder temperatures can increase soil resistivity as water in soil may freeze, reducing conductivity. Warmer temperatures generally improve conductivity. Soil Composition Changes: Seasonal changes in organic matter decomposition and salt concentration may also affect soil resistivity. Vegetation and Ground Cover: Plant growth during certain seasons can affect soil moisture retention and contact with grounding electrodes. Implications Testing during different seasons may yield varying results; hence, baseline measurements should be taken in both dry and wet conditions to understand worst-case scenarios. For accurate monitoring and compliance, schedule tests consistently or adjust acceptable resistance thresholds based on seasonal variation. 32 Printing & Packaging Machinery :- Top Brands: HEIDELBERG (Germany) – Offset printing KBA (Koenig & Bauer) – Sheetfed & web printing BOBST (Switzerland) – Die cutting, folder-gluers Windmöller & Hölscher (W&H) – Flexographic printing MAN Roland – Newspaper and offset printing Request form 33 What is PQ analyzer , how it is different than Power recorders ? A Power Quality Analyzer and a Power Recorder may appear similar at first glance, but they serve distinct purposes in electrical diagnostics and monitoring. A Power Quality Analyzer is specifically designed to detect, analyze, and troubleshoot disturbances in the power system such as voltage sags, swells, transients, harmonics, flicker, unbalance, and frequency deviations. These analyzers are equipped with high-speed sampling capabilities, waveform capture, and harmonic spectrum analysis tools, making them ideal for identifying and resolving issues that can affect the performance or lifespan of sensitive electrical equipment. They are also commonly used for compliance monitoring against standards like EN 50160 or IEEE 519. In contrast, a Power Recorder is primarily used for long-term logging of power parameters such as voltage, current, power (kW, kVA, kVAR), and energy consumption. Its focus is more on load studies, energy audits, and identifying usage patterns over time rather than real-time disturbances or quality issues. Power Recorders usually measure and log RMS values at set intervals and are not typically equipped to detect fast transients, harmonics, or waveform-level events. While some overlap exists—many modern Power Quality Analyzers also offer recording functionality—the key difference lies in the depth of analysis. A Power Quality Analyzer is a diagnostic tool used when there’s a suspected problem or for verifying power quality compliance, whereas a Power Recorder is more of a monitoring tool for tracking energy use and system loading trends over time. 34 How does internal resistance measurement indicate battery health? Internal resistance (IR) is the opposition a battery offers to current flow within its own structure. As batteries age or degrade, their internal resistance increases due to chemical wear, sulfation (in lead-acid), or electrode deterioration. Here's how it reflects battery health: Low IR = Healthy battery: Indicates good electrolyte condition, intact electrodes, and low energy loss during discharge. High IR = Degraded battery: Results in voltage drops under load, reduced capacity, and heat generation during operation. Rising IR over time signals aging or developing faults, even if voltage appears normal. Sudden spikes in IR may indicate failing cells or poor interconnections. Thus, internal resistance is a quick, non-invasive diagnostic metric used to identify weak or failing batteries before they cause critical power failures. KPM’s battery analyzers measure IR accurately across large battery banks, providing real-time indicators of cell health and enabling predictive maintenance. 35 Do you know the common standards and regulations followed for energy meter calibration? What are the common standards and regulations followed for energy meter calibration? Energy meter calibration is governed by international and regional standards to ensure accuracy, reliability, and uniformity. The most widely followed standards include: IEC 62053 series: International standards specifying performance and accuracy requirements for different classes of electricity meters (e.g., IEC 62053-21 for static meters, IEC 62053-22 for active energy meters, and IEC 62053-23 for reactive energy meters). IEC 60521 and IEC 60522: Standards covering calibration methods and testing procedures for electric meters. ANSI C12 series: North American standards, such as ANSI C12.20, that define accuracy classes and testing protocols for electric meters. OIML R46: International recommendation by the International Organization of Legal Metrology outlining accuracy requirements and test procedures for electricity meters used in billing. National regulations: Many countries have their own legal metrology regulations and certification requirements to ensure meters used for billing comply with local laws. 36 3. What types of cable defects can VLF testing detect? VLF testing is effective at identifying a wide range of insulation defects and weaknesses within medium- and high-voltage power cables. It can detect partial discharge (PD) activity, which is a common early indicator of insulation deterioration such as microscopic voids or cracks within the cable’s insulation material. These PD sites generate localized electrical discharges that degrade the insulation over time, potentially leading to catastrophic failure if not addressed. Additionally, VLF testing can reveal water ingress problems, where moisture penetrates the insulation and lowers its dielectric strength, as well as contamination or aging effects such as thermal, mechanical, or chemical degradation of the insulation material. It can also uncover manufacturing defects like thin spots, improper curing, or insulation gaps. While VLF testing is excellent for assessing the overall integrity of the cable insulation and detecting areas of weakness, it may not precisely locate the defects. For detailed localization, it is often combined with other techniques such as partial discharge (PD) measurements or time-domain reflectometry (TDR). 37 What parameters are measured during online testing of lightning arresters? During online testing of lightning arresters, the key parameters measured include: Leakage current: Both resistive and capacitive components are monitored to detect insulation deterioration or moisture ingress. Discharge current: Measures the arrester’s response to transient overvoltages. Voltage across the arrester: To correlate leakage current with operating voltage. Power factor (dissipation factor): Indicates the level of insulation losses and ageing. Harmonic content of leakage current: Helps identify partial discharges or defects. Continuous monitoring of these parameters helps identify early signs of failure and evaluate arrester condition in real time. 38 What are the key parameters measured by a battery analyzer? A battery analyzer is used to assess the condition and performance of individual cells and complete battery banks. The key parameters it typically measures include: Internal Resistance (IR):Indicates the battery’s ability to deliver current. Higher resistance means deterioration or aging. Voltage (V): Measures the open-circuit voltage of each cell or unit to check state-of-charge and overall health. Conductance (optional): Used as an alternative to resistance in some analyzers to determine battery condition. Temperature (°C): Affects performance and safety. Monitoring ensures accurate readings and helps prevent overheating. State of Health (SoH): Some analyzers estimate the health of the battery based on historical and real-time data. Cell Imbalance: Detects inconsistencies among cells in a battery bank, which can lead to system failure. Ripple Voltage (if applicable): Monitors AC noise on DC lines, often in UPS and telecom systems. KPM’s battery analyzers measure all key parameters—internal resistance, voltage, temperature, and cell imbalance—with high accuracy. Features include: High-precision sensors and rugged design for utility environments, Built-in safety features (reverse polarity, overvoltage alerts), PC software for data logging, trending, and report generation. Widely used in substations, power plants, and telecom towers for preventive maintenance and health diagnostics. 39 What types of leakage current patterns indicate a failing arrester? In surge arresters (typically metal oxide varistor or MOV-based), leakage current patterns can offer early warning signs of deterioration or failure. Here are the key types of leakage current patterns that indicate a failing arrester: 1. Increasing Total Leakage Current Over Time What it means: The arrester is gradually losing its insulation resistance. Cause: Ageing of the zinc oxide blocks or moisture ingress. Warning: A consistent upward trend is a red flag — especially under normal system voltage. 2. High Resistive Leakage Current What it means: An increase in resistive (non-linear) current indicates internal degradation. Why it's critical: Unlike capacitive leakage (which is normal), resistive leakage is a sign of arrester deterioration. How it shows up: Measured using third-harmonic analysis or waveform separation techniques. 3. Sudden Jumps or Spikes in Leakage Current What it means: Possible internal flashover, moisture ingress, or external contamination. Typical sign: A sharp increase without a gradual trend. Next step: Immediate inspection or replacement is usually advised. 4. Leakage Current with Strong Daily Variation What it means: Leakage current rises during daytime due to heating and falls at night — abnormal if variation is large. Potential cause: Moisture or contamination interacting with thermal cycles. 5. Phase Shift Changes in Leakage Current What it means: The phase angle between voltage and leakage current shifts — especially the third harmonic. Used in: Online monitoring systems. Why it matters: Indicates the balance between capacitive and resistive components is shifting unfavourably. 6. Leakage Current under Wet Conditions What it means: If leakage current increases dramatically during rain or fog, it may indicate surface tracking or contamination. Action: Cleaning or replacing the arrester may be required. 40 Do you know which equipment is used as a reference standard during energy meter calibration? The reference standard in energy meter calibration is a highly accurate and traceable device known as a calibration standard meter or reference meter. This equipment has a much higher precision than the meter under test, typically with an accuracy class of 0.02% or better. Common types include: Standard reference meters: Precision static energy meters designed specifically for calibration, with traceability to national or international measurement standards. Calibrated instrument transformers: High-accuracy current and voltage transformers to supply accurate test signals. Precision power sources: Devices that can generate stable and controllable voltage and current at various loads and power factors to simulate real operating conditions. Calibration benches or test rigs: Integrated setups that combine the above equipment to perform automated, controlled calibration tests. Using these reference standards ensures that the energy meter calibration is accurate, repeatable, and compliant with metrology requirements. 41 4. What is Tan Delta (VLD) testing, and how does it assess cable insulation quality? Tan Delta (also called Very Low Dissipation factor or VLD) testing measures the dielectric losses in cable insulation by applying an AC voltage and analyzing the phase difference between the current and voltage. The "tan delta" represents the ratio of resistive (lossy) current to capacitive (ideal) current. A low tan delta value indicates good insulation with minimal energy loss, while higher values suggest deterioration due to moisture, contamination, or aging. By measuring these losses, Tan Delta testing assesses the overall insulation condition and detects early-stage degradation before catastrophic failure. It is highly sensitive to insulation quality changes and is commonly used for condition assessment and preventive maintenance of medium- and high-voltage cables. 42 How Harmonics Affect Transformer Performance? Effects of Harmonics on Transformer Performance Increased Heating (Core and Copper Losses): Harmonics cause additional eddy current and hysteresis losses in the transformer core and I²R losses in the windings due to the skin effect and proximity effect. This leads to excessive heating, even when the transformer is operating within its rated current. This can reduce transformer lifespan or even cause thermal failure. Reduced Efficiency: As harmonic losses increase, the overall efficiency of the transformer drops. It may appear to be operating under normal conditions in terms of RMS values, but real power losses are higher. Derating of Transformer: To compensate for the increased losses due to harmonics, transformers are often derated (i.e., used at less than their nameplate capacity) when supplying non-linear loads. IEEE Std C57.110 provides guidelines for calculating the required derating. Increased Vibration and Noise: Harmonics can cause magnetostriction effects in the transformer core, resulting in audible noise and mechanical vibration, which can be especially problematic in sensitive environments. Insulation Stress and Aging: Repeated thermal cycling due to harmonic-induced heating stresses the insulation system, accelerating insulation degradation and reducing transformer life expectancy. Neutral Overload (in 3-phase systems): In systems with significant triplen harmonics (3rd, 9th, 15th...), these components add arithmetically in the neutral conductor. This can cause the neutral to overheat, even if the phase conductors are within limits. Incorrect Protective Relay Operation: Harmonic distortion can interfere with current and voltage sensing used in protective relays, leading to nuisance tripping or failure to trip during faults. 43 Pharmaceutical, Chemical & Process Equipment :- Top Brands: Glatt (Germany) – Fluid bed systems, granulators GEA (Germany) – Process engineering, mixers FETTE (Germany) – Tablet presses IMA (Italy) – Packaging & pharma lines Hosokawa Alpine (Germany) – Powder & particle processing Request form 44 Qu'est-ce qu'un kit de test de relais universel ? Le kit de test de relais universel est un autre nom pour les kits de test de relais automatiques car l'utilisateur peut faire varier la phase, la fréquence et l'amplitude des sources de courant et de tension indépendamment et générer tout type de défaut. 45 Why is understanding Coil Current Analysis in Breaker Testing important ? Coil current analysis involves measuring the current drawn by the trip and close coils during circuit breaker operation. This current signature helps diagnose the breaker’s mechanical and electrical health. Changes in current shape, peak value, or duration can reveal issues like sluggish movement, coil burnout, weak springs, or mechanical obstructions. Analyzing the coil current curve provides early warnings of potential failure before timing or contact issues become visible. It enhances predictive maintenance and helps avoid costly downtime. KPM’s test systems capture detailed coil current waveforms, enabling precise diagnostics, improved reliability, and safe operation of critical power systems. 46 How AH Curve Tracers Improve Battery Quality Analysis? Ampere-Hour (AH) Curve Tracers or constant current discharge testers are critical tools for evaluating battery quality. By discharging the battery at a fixed current and recording voltage over time, they generate AH curves that reveal: 1. Actual capacity vs. rated capacity 2. Voltage stability during load 3. Internal resistance and aging behavior 4. Cut-off voltage performance 5. Cell degradation patterns over cycles This data helps manufacturers and maintenance teams identify underperforming cells, confirm batch consistency, and detect early signs of capacity fade—essential for EVs, energy storage, and critical backup systems. KPM’s Constant Current Battery Testing Equipment is designed for precise AH curve analysis. It offers programmable discharge rates, real-time voltage monitoring, and auto cut-off features. With multi-channel support and detailed data logging, it enables accurate grading, performance benchmarking, and lifecycle testing—ensuring battery packs meet safety and performance standards before deployment. 47 How to Identify Oil Contamination Using BDV Testers? Breakdown Voltage (BDV) testing is a key method to identify contamination in insulating oils used in transformers, circuit breakers, and other high-voltage equipment. A BDV tester applies a gradually increasing AC voltage to a sample of insulating oil placed between two standard electrodes. Clean, dry oil has high dielectric strength and resists electrical breakdown. However, the presence of moisture, dissolved gases, carbon particles, or sludge lowers the breakdown voltage significantly. Typically, good transformer oil should withstand 30 kV or more in a 2.5 mm electrode gap. A low BDV reading (e.g., below 20 kV) suggests contamination. Multiple test cycles (usually 5–6) help eliminate anomalies and confirm consistency. KPM provides automated and manual BDV testers with features like automatic voltage ramping, stirrers for even testing, digital displays, and built-in standards (IEC 60156, ASTM D1816), ensuring accurate detection of oil contamination and timely maintenance planning. 48 What are the Diagnosing Cable Defects With HFCT-Based PD Testing ? High-Frequency Current Transformer (HFCT) sensors are widely used for detecting and diagnosing partial discharge (PD) activity in power cables. They are clamped around the earth (ground) conductor to sense high-frequency current pulses generated by insulation defects. How HFCT PD Testing Works: PD Activity Inside Cable Insulation: Voids, cracks, or deteriorated insulation cause small electrical discharges. Pulse Propagation: These discharges generate high-frequency current pulses (MHz range) that flow along the grounding system. HFCT Sensor Detection: The HFCT sensor detects these pulses non-invasively by clamping it around the cable’s earth conductor without disconnecting the system. Signal Analysis: The captured pulses are analyzed for: Pulse shape and repetition rate Time-of-flight (for PD location) Amplitude and phase-resolved patterns (PRPD) What It Diagnoses: Defects in cable joints, terminations, insulation Water trees or aging in XLPE cables Internal corona or tracking activity Advantages of HFCT PD Testing: Online or offline testing possible Non-intrusive and safe Early detection prevents costly cable failures Can be used with multiple sensors for PD location (triangulation) KPM’s HFCT-based PD testing solutions are designed for rapid setup, high sensitivity, and advanced diagnostics—enabling utilities and industries to monitor cable health with confidence. 49 What are Real-World Applications of PQ Recorders? Real-World Applications of Power Quality (PQ) Recorders 1. Load Profiling and Energy Audits PQ recorders are commonly used to monitor energy consumption patterns over time. This helps identify peak demand periods, base loads, and inefficiencies, supporting energy optimization and cost savings. 2. Electrical System Commissioning During commissioning of new installations—such as switchboards, transformers, or generators—PQ recorders verify voltage levels, current balance, and overall system performance to ensure proper operation. 3. Capacity Planning and Expansion Before adding new electrical loads, PQ recorders assess whether existing infrastructure can support the additional demand. This prevents overloading and supports informed upgrade decisions. 4. Renewable Energy Integration In solar and wind power systems, PQ recorders monitor output stability, voltage, and frequency to ensure grid compliance and smooth integration with the main supply. 5. Troubleshooting Intermittent Issues When power issues such as flickering, nuisance tripping, or undervoltage occur, PQ recorders help log and analyze events that may not be immediately visible during spot checks. 6. Utility Billing Verification PQ recorders provide accurate data for verifying utility charges, particularly demand-based billing and power factor penalties, helping avoid disputes or overcharges. 7. Temporary Power Monitoring For construction sites, events, or mobile power setups, PQ recorders ensure temporary supplies are stable, safe, and suitable for operational requirements. 8. Preventive Maintenance and Trend Analysis Long-term monitoring enables early detection of issues like increasing unbalance or loading trends, allowing for proactive maintenance before failures occur. 50 How do environmental conditions affect energy meter calibration results? Environmental factors like temperature, humidity, and atmospheric pressure can influence the accuracy of energy meter calibration. Temperature: Changes in temperature can affect the electrical characteristics of meter components, causing measurement drift or errors. Most calibration standards specify temperature ranges within which tests should be performed to ensure consistency. Humidity: High humidity can cause condensation or moisture ingress, impacting insulation resistance and electronic circuits, leading to inaccurate readings during calibration. Atmospheric pressure: Variations in pressure can subtly affect electrical properties, especially in sensitive equipment, although its impact is generally less significant than temperature or humidity. To minimize these effects, calibrations are ideally conducted in controlled laboratory environments with stable temperature and humidity, or environmental conditions are recorded and accounted for in the calibration report. 51 Which standard is most widely accepted worldwide? The IEC 60099-4 standard (from the International Electrotechnical Commission) is the most widely accepted global standard for metal-oxide lightning arresters. It defines performance criteria, testing procedures—including online monitoring methods—and requirements for high-voltage arresters used in power systems. The B2 method for assessing leakage current in metal-oxide surge arresters is detailed in the IEC 60099-4 standard — specifically in IEC 60099-4:2013, titled "Surge arresters — Part 4: Metal-oxide surge arresters without gaps for AC systems — Methods of test". This standard outlines how to measure and analyze leakage current components, including the resistive part used in the B2 method, for condition assessment and online monitoring of high-voltage lightning arresters. 52 How to do Dynamic Contact Travel Analysis ? Dynamic contact travel analysis measures the real-time movement of a circuit breaker’s main contacts during operation using motion sensors or transducers. It captures parameters like stroke, velocity, overtravel, rebound, and contact wipe. This test reveals mechanical wear, misalignment, or sluggish movement that timing tests alone can miss. It ensures the breaker’s mechanical integrity, proper contact engagement, and smooth operation under stress. KPM’s breaker analyzers support dynamic travel analysis with high-resolution sensors and software that visualizes motion curves. This allows for accurate diagnostics, preventive maintenance, and verification that breakers meet design and safety standards. 53 Qu'est-ce que le kit de test de relais 6 phases, lorsqu'il n'y a que 3 phases CT ou PT dans le système d'alimentation ?" De nombreux clients sont confus avec la notation du kit de test de relais 6 phases. Les kits de test de relais haut de gamme disposent de six sources de courant dont la fréquence de phase et l'amplitude peuvent varier indépendamment. Ces 6 sources de courant sont très utiles pour tester un relais différentiel. 54 What is UHF PD Testing in GIS – High Sensitivity Explained? Ultra High Frequency (UHF) PD testing in Gas-Insulated Switchgear (GIS) is a highly sensitive method that detects partial discharge by capturing electromagnetic signals in the 300 MHz to 1.5 GHz range. GIS enclosures, being metallic and sealed, confine PD signals and create a low-noise environment—making UHF detection extremely effective. UHF sensors, typically built into or attached to the GIS via couplers or antennae, pick up these fast transients without interfering with system operation. This method offers excellent immunity to external noise and allows early detection of insulation defects such as voids, surface discharges, or corona, enabling preventive maintenance and reducing outage risk. KPM’s UHF PD solutions are optimized for GIS testing, offering precise, real-time diagnostics with minimal intrusion. 55 Woodworking Machines :- Top Brands: HOMAG Group (Germany) – CNC routers, edgebanders BIESSE (Italy) – CNC machining centers SCM Group (Italy) – Panel saws, joinery machines Altendorf (Germany) – Panel saws Request form 56 What do you mean by Preventing Battery Fires also what are the Role of Air Leakage Testers ? Battery fires often originate from internal short circuits, moisture ingress, or poor sealing during manufacturing. Air leakage testers play a critical role in preventing such incidents by verifying the airtightness of battery cells, modules, and packs. These testers use pressure decay, vacuum decay, or mass flow methods to detect even the smallest leaks. Ensuring proper sealing prevents oxygen or humidity from entering the cell enclosure, which can lead to electrolyte degradation, corrosion, or thermal runaway in lithium-ion batteries. Regular air leakage testing helps: Maintain IP-rated enclosures for harsh environments Detect seal defects before cell assembly Ensure consistency in automated production lines Comply with safety standards like UN38.3 and IEC 62133 KPM offers high-sensitivity air leakage testers tailored for EV and energy storage applications. With fast cycle times, digital pressure control, and data traceability, KPM’s solution enhances quality assurance and plays a vital role in fire prevention and safe battery operation. 57 What is Viscosity and Pour Point in Transformer Oils? Viscosity is the measure of a fluid's resistance to flow. In transformer oils, optimal viscosity is crucial for: Heat transfer: Low viscosity allows better circulation and cooling. Lubrication: Protects internal parts from wear. Pump efficiency: Thinner oil reduces mechanical stress on pumps. High viscosity at low temperatures can hinder oil movement, reducing cooling and increasing risk of overheating. Transformer oils typically have a viscosity range of 8–12 cSt at 40°C, as per IEC and ASTM standards. Pour Point: Pour point is the lowest temperature at which oil still flows. It indicates how oil behaves in cold environments. A low pour point ensures the oil remains pumpable and circulates properly during cold starts or winter operation. A good transformer oil has a pour point below -30°C, as per ASTM D97 or ISO 3016. KPM provides viscosity and pour point testing kits and services compliant with ASTM D445 and D97, ensuring transformer oil meets safety and performance standards. 58 Can battery conductivity testing detect early-stage cell degradation ? Conductivity is a measure of a battery’s ability to pass electrical current. In healthy batteries, conductivity is high because the internal chemical pathways are clean and efficient. As a cell begins to degrade (due to sulfation, corrosion, electrolyte breakdown, or plate shedding), these pathways become obstructed, causing conductivity to decrease—even before voltage or capacity noticeably drops. Early Detection: Changes in conductivity often occur before performance failures, allowing for early intervention. Identifies Weak Cells: It helps isolate underperforming cells within a battery bank. Prevents Failures: Enables predictive maintenance and avoids costly downtime. Monitors Aging: Tracks gradual degradation over time for lifecycle management. KPM’s advanced battery analyzers can perform conductivity or internal resistance-based diagnostics, depending on battery type. These tools help utility and industrial users identify subtle degradation trends early, plan timely maintenance, and ensure long-term battery reliability. 59 5. How do Tan Delta results indicate the health or degradation of a cable? Tan Delta results reflect the insulation’s dielectric losses, which increase as the cable ages or deteriorates. A low tan delta value means the insulation is healthy, with minimal leakage current and good dielectric integrity. Conversely, a rising tan delta value indicates increasing insulation defects such as moisture ingress, contamination, cracks, or thermal aging. Trends in tan delta over time are especially important: a gradual increase suggests progressive degradation, allowing maintenance teams to plan repairs before failure occurs. Sudden spikes may point to acute damage or contamination. Thus, monitoring tan delta values helps assess the insulation’s condition, predict remaining service life, and prioritize maintenance actions. 60 What are the Benefits of 24/7 Power Quality Monitoring? Benefits of 24/7 Power Quality Monitoring : 1. Continuous Visibility Real-time tracking of voltage, current, harmonics, and disturbances ensures you always have a clear picture of system health — without waiting for issues to escalate. 2. Early Fault Detection Continuous monitoring helps detect developing issues like transformer overload, harmonic distortion, or voltage imbalance before they cause damage or downtime. 3. Minimizes Unplanned Downtime By identifying power disturbances early, 24/7 PQ monitoring reduces the risk of equipment failure, production loss, or service interruption. 4. Improves Equipment Lifespan Stable power quality reduces stress on motors, drives, UPS systems, and sensitive electronics — extending their service life and reducing maintenance costs. 5. Supports Root Cause Analysis Historical event logs and waveform captures make it easier to trace the cause of faults, helping engineers respond faster and more accurately. 6. Compliance & Reporting Automated recording helps meet regulatory standards (e.g., EN 50160, IEEE 519) and supports internal audits or external quality reports. 7. Energy Efficiency Optimization By continuously monitoring power factor, load balance, and harmonic content, users can implement corrective actions to reduce losses and improve system efficiency. 8. Informs Investment Decisions Reliable long-term data helps justify infrastructure upgrades, sizing of backup systems, or addition of filters and stabilizers. 61 Why is constant current discharge testing crucial in critical power applications? Constant current discharge testing is essential because it directly evaluates a battery’s actual capacity and performance under load, simulating real-world power demands. In critical power applications—such as substations, hospitals, data centers, and telecom systems—batteries must supply reliable power during outages or switching events. If a battery cannot sustain the required current for the expected duration, it risks system failure, data loss, or equipment damage. Key reasons it’s crucial: Confirms True Capacity: Validates if the battery can deliver its rated ampere-hours (Ah) under specified load. Identifies Weak Batteries: Detects hidden degradation not revealed by voltage or internal resistance alone. Reveals Runtime Performance: Simulates backup duration under real conditions. Supports Preventive Maintenance: Enables data-driven decisions for battery replacement and servicing. KPM’s constant current discharge kits are designed for high-reliability environments. They offer programmable loads, auto cut-off, data logging, and safety features, ensuring accurate, safe, and standards-compliant capacity testing for critical backup systems. 62 6. What is VLF Partial Discharge (PD) testing, and how does it help's identify insulation defects? VLF Partial Discharge (PD) testing uses very low frequency voltage to stress the cable insulation while detecting and measuring partial discharges—tiny electrical sparks that occur within insulation voids or defects. These discharges are often early signs of insulation failure, caused by imperfections like cracks, voids, or contamination. By capturing PD activity, VLF PD testing helps pinpoint insulation defects before they lead to catastrophic cable failure. It provides valuable insight into the type, location, and severity of defects, enabling targeted maintenance and reducing unplanned outages. This makes it a crucial tool for proactive cable condition assessment. 63 What is Flash Point Testing? What are its Safety Standards and Applications? Flash point testing determines the lowest temperature at which a liquid emits enough vapor to ignite in the presence of an ignition source. It is a critical parameter for assessing the fire and explosion risk of flammable and combustible liquids such as fuels, lubricants, and transformer oils. This test ensures the safe handling, storage, and transportation of these substances. Globally recognized standards such as ASTM D93 (Pensky-Martens Closed Cup), ISO 2719, and ASTM D56 (Tag Closed Tester) provide standardized methods to ensure consistency and safety. Applications span industries like petrochemicals, energy, pharmaceuticals, and aviation, where accurate flash point data is essential for risk assessments, regulatory compliance, and material classification. KPM ensures strict adherence to international safety standards by offering flash point testers that comply with ASTM D93, ISO 2719, and related norms. KPM’s equipment features precision temperature control, sealed test chambers, and automation to eliminate user error. These instruments are calibrated and validated regularly to maintain measurement integrity. Additionally, KPM provides comprehensive support, including training and servicing, to ensure customers conduct testing safely and accurately. By aligning with global testing protocols, KPM plays a key role in advancing operational safety and regulatory compliance across 64 Quel est le besoin d'un logiciel avancé avec les kits de test de relais automatiques ? Comme nous savons que chaque défaut est généré en raison d'une variation de phase, de fréquence ou d'amplitude dans le signal CT ou PT, peu de simulations de défauts ne sont pas très simples (comme le test des caractéristiques quadrilatérales des relais de distance). Les logiciels avancés sont très utiles pour simuler des défauts complexes. Kingsine User obtient tout en un un logiciel avancé dans son achat standard. 65 What is the difference between static and dynamic energy meter calibration? Static calibration tests the energy meter under steady-state conditions by applying fixed voltage and current values at set loads and power factors. It measures the meter’s accuracy when the electrical parameters remain constant, helping to verify basic performance and error under controlled, stable conditions. Dynamic calibration, on the other hand, evaluates the meter’s performance under varying, real-world operating conditions where voltage, current, and load fluctuate over time. It simulates actual usage patterns to assess how accurately the meter records energy during transient events, load changes, and power quality variations. While static calibration is simpler and faster, dynamic calibration provides a more comprehensive assessment of meter accuracy in practical scenarios, especially important for modern smart meters and complex electrical systems. 66 Do you know Which parameter are measured in IEC 60099-4 B2 Method ? In the B2 method, leakage current measurement is used to evaluate the condition of a metal-oxide lightning arrester by analyzing its resistive (non-capacitive) leakage current component while the arrester is energized at operating voltage. Here’s how it works: Measurement: The total leakage current flowing through the arrester is measured using sensitive instruments. This current consists of a capacitive component (normal and stable) and a resistive component (indicative of arrester aging or damage). Resistive component isolation: The B2 method focuses on isolating the resistive part of the leakage current, as an increase in resistive current usually signals degradation, moisture ingress, or damage to the arrester’s internal varistors. Analysis: By comparing the measured resistive leakage current to baseline or manufacturer’s reference values, the condition of the arrester can be assessed. A rising resistive leakage current over time indicates deteriorating insulation and the potential for failure. Trend monitoring: Periodic measurements allow trend analysis, helping predict the arrester’s remaining life and plan maintenance before catastrophic failure occurs. This method is widely used because it is sensitive, non-invasive, and can be performed online without disconnecting the arrester. 67 Construction & Heavy Machinery :- Top Brands: LIEBHERR (Germany) – Cranes, earthmovers WIRTGEN Group (Germany) – Road construction machines BOMAG (Germany) – Rollers, pavers MAN (Germany) – Trucks, concrete mixers Request form 68 How PD Can Cause Catastrophic Failures If Left Undetected ? Partial Discharge (PD) is a small electrical spark that occurs within insulation systems due to defects like voids, cracks, or contamination. While each discharge releases only a small amount of energy, repeated activity degrades insulation over time, leading to progressive damage. If left undetected, PD can cause tracking, erosion, thermal breakdown, and eventually a complete insulation failure. This can result in catastrophic equipment breakdowns, fires, arc flash events, or prolonged outages. Early PD detection helps identify developing faults before they escalate, allowing timely intervention. KPM’s PD monitoring solutions provide accurate diagnostics to prevent such costly and dangerous failures. 69 What is EV Battery Diagnostics ? What are the Tools Every Service Center Must Have? As electric vehicles (EVs) grow rapidly, service centers must be equipped with specialized battery diagnostic tools to ensure safe and effective maintenance. Key tools include: Battery Pack Testers – For measuring voltage, current, capacity, and SOH (State of Health) during charge/discharge cycles. Cell Balancing Analyzers – To detect and correct imbalances between individual cells in the pack. Insulation Resistance Testers – Essential for checking insulation integrity to prevent leakage currents and electrical hazards. Thermal Imaging Devices – For identifying overheating cells or poor thermal management. Communication Interface Tools – To read battery management system (BMS) data via CAN or other protocols. Air Leakage Testers – To ensure sealed packs meet safety standards. KPM provides an integrated suite of EV battery testing equipment, including constant current testers, smart BMS diagnostic tools, cell balancers, and leakage testers. Designed for workshop and field use, KPM’s devices offer fast, accurate, and automated diagnostics, helping service centers improve safety, reduce downtime, and extend battery life. 70 What is Vacuum Interrupter Testing ?What is its Life Cycle and Failure Modes? Vacuum interrupters (VIs) are critical components in medium-voltage circuit breakers, responsible for arc extinction. Though sealed for life, their performance can degrade over time. Life Cycle: VIs have a defined mechanical and electrical life—typically 10,000+ operations or a set number of fault interruptions. Factors like switching frequency, fault levels, and contact wear influence lifespan. Failure Modes: Loss of vacuum (leakage) Contact erosion or misalignment Internal flashover or dielectric breakdown Testing: KPM offers vacuum interrupter testers to check vacuum integrity using high-voltage AC/DC or magnetron-based methods, ensuring reliability, safety, and timely replacement decisions. 71 How often should energy meters be recalibrated to ensure accuracy? Energy meters should typically be recalibrated every 3 to 5 years, depending on regulatory requirements, manufacturer recommendations, and the operating environment. Frequent recalibration helps detect any drift in accuracy caused by aging, environmental factors, or mechanical wear. In critical applications or harsh conditions, more frequent recalibration may be necessary. Utilities often follow national standards or legal metrology guidelines that specify maximum intervals to maintain measurement reliability and billing fairness. 72 What is Oil Tan Delta? Also understanding Dielectric Loss. Tan Delta, also known as the dissipation factor, is a key parameter used to evaluate the dielectric loss in insulating oils. It represents the ratio of the resistive current to the capacitive current within the oil when subjected to an alternating electrical field. It measures the inefficiency or energy loss in the insulation system when subjected to an alternating electric field. A low Tan Delta value indicates good insulation quality with minimal dielectric loss, while a high value suggests aging, moisture contamination, or deterioration of the insulating oil. Tan delta testing is a crucial diagnostic tool for assessing the health of insulating oil. By understanding the relationship between tan delta, dielectric loss, and the condition of the oil, maintenance professionals can take steps to ensure the reliable and safe operation of electrical equipment. KPM offers advanced Tan Delta testing instruments that comply with IEC and ASTM standards. These kits provide accurate, real-time results with user-friendly operation and robust design. KPM also offers expert support, calibration, and on-site testing services to help utilities maintain insulation health effectively. 73 Why you Shouldn’t Ignore Pre-Insertion Resistor Testing ? Pre-insertion resistors (PIRs) reduce inrush currents during circuit breaker closing, protecting equipment from voltage transients and mechanical stress. Ignoring PIR testing can lead to undetected resistor failure, delayed insertion, or complete bypass—compromising system stability. Regular PIR testing verifies correct resistor engagement, timing, and resistance values. It ensures effective damping of switching surges, especially in capacitor bank or transformer applications. KPM’s breaker analyzers can assess PIR timing and resistance performance with precision, helping prevent equipment damage, extend asset life, and maintain reliable power system operation. Skipping this test risks hidden failures and costly breakdowns. 74 Pourquoi les amplificateurs de courant et de tension élevés sont souhaitables dans les kits de test de relais On dit vraiment que les sources de courant et de tension sont l'âme du kit de test de relais. Le signal de courant et de tension élevé est utile des manières ci-dessous Pour tester les relais de surintensité 5A à 10 fois, nous devons injecter 3X50A, ce qui est possible avec les kits de test de relais à courant élevé Avec un courant plus élevé, nous pouvons tester un relais différentiel au point le plus élevé de la courbe BIAS. Avec des courants plus élevés, nous pouvons simuler des défauts plus élevés dans la lecture des défauts transitoires. Les kits de test Kingsine ont les sources de courant nominal les plus élevées de 0 à 35 A chacune (@450 VA) et de 0 à 300 V chacune (124 VA) 75 How is the battery's capacity (Ah) validated through a discharge test? Battery capacity, measured in ampere-hours (Ah), is validated by discharging the battery at a constant current until it reaches its specified cut-off voltage. The total time it takes to reach that voltage determines the actual capacity using the formula: Capacity (Ah)=Discharge Current (A) × Discharge Time (hours) Example: If a battery is discharged at 10 A and it takes 5 hours to reach the end voltage, the delivered capacity is: 10 A × 5 hrs = 50 Ah This result is then compared to the battery’s rated capacity (e.g., 100 Ah). If it delivers significantly less, it indicates degradation or failure. KPM’s constant current discharge kits precisely control and monitor the discharge current and voltage. They record time-stamped data, auto-calculate Ah, and generate test reports. These tools comply with standards like IEEE 450, ensuring reliable capacity validation for utility and industrial batteries. 76 Do you know Charging vs. Discharging Tests: Key Differences Explained, Advantages of each test? Charging and discharging tests are both essential for evaluating battery performance, but they serve different purposes and reveal different insights. Both tests are complementary—charging tests help optimize input energy handling, while discharging tests validate output performance. Together, they provide a comprehensive view of battery health and reliability Key Differences Feature : Charging Test Discharging Test Purpose : Assess charging efficiency & behavior Measure capacity, energy output, Stability Data Collected : Charge time, input current, voltage rise Discharge time, voltage drop, delivered AH Risks : Overcharging, thermal buildup Deep discharge, undervoltage stress Monitoring Focus : Temperature rise, end-of-charge detection Voltage sag, current stability, thermal trend Control : CC/CV (Constant Current/Voltage) Constant Current or Constant Power load Advantages of Charging Test Evaluates charging curve behavior and efficiency Helps in BMS calibration and charger compatibility Detects issues like overvoltage cutoff failure or high IR during charge Monitors thermal response during charging cycles Advantages of Discharging Test Measures real usable capacity of the battery Identifies aging or weak cells through voltage sag Simulates real-world usage conditions Critical for state of health (SOH) estimation and performance grading KPM’s battery testers support both charging and discharging modes with programmable current profiles, real-time monitoring, and data logging, enabling accurate, automated, and safe battery diagnostics across EVs, energy storage, and R&D applications. 77 Which compensations are taken care in B2 method typically In the B2 method, leakage current measurement is used to evaluate the condition of a metal-oxide lightning arrester by analyzing its resistive (non-capacitive) leakage current component while the arrester is energized at operating voltage. Here’s how it works: Measurement: The total leakage current flowing through the arrester is measured using sensitive instruments. This current consists of a capacitive component (normal and stable) and a resistive component (indicative of arrester aging or damage). Resistive component isolation: The B2 method focuses on isolating the resistive part of the leakage current, as an increase in resistive current usually signals degradation, moisture ingress, or damage to the arrester’s internal varistors. Analysis: By comparing the measured resistive leakage current to baseline or manufacturer’s reference values, the condition of the arrester can be assessed. A rising resistive leakage current over time indicates deteriorating insulation and the potential for failure. Trend monitoring: Periodic measurements allow trend analysis, helping predict the arrester’s remaining life and plan maintenance before catastrophic failure occurs. This method is widely used because it is sensitive, non-invasive, and can be performed online without disconnecting the arrester. 78 Food & Beverage Machinery:- Top Brands: Krones AG (Germany) – Bottling, filling lines GEA (Germany) – Dairy, juice, beer lines ALFA LAVAL (Sweden) – Heat exchangers, separators Tetra Pak (Sweden) – Packaging and UHT Multivac (Germany) – Vacuum packaging Request form 79 How Often Should You Perform Partial Discharge Tests? The frequency of Partial Discharge (PD) testing depends on equipment type, criticality, age, and operating environment: New Installations: Test during commissioning to detect manufacturing or installation defects. Routine Maintenance: For critical assets (e.g., GIS, transformers, cables): annually or semi-annually For less critical systems: every 2–3 years Condition-Based Monitoring: For aging or high-risk equipment, use continuous or periodic online PD monitoring. After Major Events: Test after faults, repairs, or overloading. KPM offers both portable and continuous PD monitoring solutions tailored to asset condition and reliability goals. 80 7. Can VLF PD testing detect early-stage insulation failures? Yes, VLF Partial Discharge (PD) testing is specifically designed to detect early-stage insulation failures. Partial discharges are small electrical sparks that occur in microscopic voids, cracks, or impurities within the cable insulation—often long before a complete breakdown happens. By applying very low frequency voltage, VLF PD testing stresses the insulation gently but effectively, allowing detection of these early PD activities. Detecting partial discharges early helps identify weak spots or developing defects in the insulation, enabling maintenance teams to address issues proactively, extend cable life, and avoid costly unplanned failures. 81 Pourquoi les amplificateurs haute puissance sont-ils souhaitables dans les kits de test de relais ? Les kits de test de relais avec des amplificateurs haute puissance sont préférables car une puissance élevée est nécessaire pour tester les relais électromécaniques. De plus, si un kit de test de relais a une puissance nominale plus élevée, son cycle de service pour une puissance nominale inférieure est élevé, d'où une conception plus robuste. Kingsine dispose des sources de courant les plus puissantes de 480 VA (@35 A) chacune et des sources de tension les plus puissantes de 124 VA (@310 V) chacune 82 What is Understanding State of Health (SOH) in Li-ion Batteries? State of Health (SOH) is a key parameter that reflects the overall condition and performance capability of a lithium-ion battery compared to its original, factory-new state. Expressed as a percentage, SOH = 100% means the battery performs at full capacity; lower values indicate degradation. Factors Affecting SOH: Capacity Fade: Reduction in charge-holding ability over cycles. Increased Internal Resistance: Leads to voltage drop and heating. Cycle Life: Number of full charge-discharge cycles completed. Temperature Stress: Accelerates degradation if outside ideal range. Charge/Discharge Rates: High currents can strain cell chemistry. How SoH is Measured: Capacity Test: Compares actual vs. rated capacity (e.g., via constant current discharge). Impedance/Resistance Test: Higher internal resistance suggests aging. Voltage Behavior Analysis: Under load, abnormal voltage drops signal poor SOH. Algorithmic Estimation: Used in BMS for real-time SOH prediction based on usage history. KPM’s battery testing equipment measures SOH using precision discharge testing, impedance analysis, and real-time voltage tracking. Its smart software computes SoH accurately, helping users assess battery viability, schedule replacements, and extend system reliability in EVs and energy storage applications. 83 What are the Best Practices in Oil Sampling and Analysis? Accurate oil sampling and analysis are vital for assessing the condition of insulating oils used in transformers and other high-voltage equipment. Key best practices include taking samples from the correct location (ideally turbulent flow areas, upstream of filters, and not from drain plugs), at the right time (when the machine is running and under normal load), and with proper techniques (using clean equipment, avoiding contamination, and labeling samples accurately). Best practices include taking samples from live equipment using clean, dry, and airtight glass or metal containers to avoid contamination. Sampling should be done from designated sampling valves, ideally after allowing sufficient oil flow to flush impurities. Samples must be labeled clearly with details like equipment ID, location, date, and temperature. Proper analysis involves tests for moisture content, dielectric strength, acidity, interfacial tension, Tan Delta, and dissolved gas analysis (DGA), offering insights into oil aging, contamination, and equipment health. KPM provides a full range of oil testing instruments, including BDV testers, moisture analyzers (Karl Fischer), and Tan Delta kits, all adhering to IEC/ASTM standards. KPM also offers oil sampling kits, training, and onsite testing services, ensuring reliable diagnostics and extending asset life. 84 What is the process for checking the linearity of an energy meter? Checking the linearity of an energy meter involves verifying that the meter’s measurement error remains consistent across a wide range of loads. The process includes: Apply multiple test currents: The meter is tested at different load levels, typically ranging from low (e.g., 10% of rated current) to full load (100%) and sometimes even above. Maintain constant voltage and power factor: During each test point, voltage and power factor are kept steady to isolate the current’s effect. Record meter readings: The energy measured by the meter under test is compared against a reference standard meter at each load level. Calculate percentage error: For each load, the error percentage is calculated based on the difference between the test meter and reference meter readings. Analyze results: A linear meter will show minimal variation in error across all loads. Significant deviations indicate non-linearity, which can affect billing accuracy. This test ensures the meter accurately measures energy consumption regardless of load size, essential for fair billing and reliable performance. 85 Industrial Automation & Robotics:- Top Brands: KUKA (Germany) – Industrial robots ABB Robotics (Switzerland) – Welding, pick & place FANUC Europe (Japan with EU operations) – CNC/robotics STÄUBLI (Switzerland) – High-speed robotics YASKAWA Europe – Motion control and robotics Request form 86 Differences Between Testing SF6, Vacuum, and Oil CBs ? Here’s a concise comparison of testing SF6, Vacuum, and Oil Circuit Breakers (CBs): SF6 CBs: Tests focus on gas pressure, density, and leakage, plus timing, contact resistance, and gas quality analysis. SF6 ensures excellent arc quenching. Vacuum CBs: Emphasis on vacuum integrity testing, contact resistance, timing, and coil current analysis. Vacuum interrupters have a sealed, long-life design. Oil CBs: Requires insulation and oil quality tests, contact resistance, timing, and sometimes oil dielectric strength checks. Oil acts as arc quenching and insulation medium. KPM offers specialized test equipment tailored for each CB type, ensuring accurate diagnostics, maintenance, and safety compliance. 87 What role does ambient temperature play in discharge test accuracy? Ambient temperature has a significant impact on the accuracy and outcome of battery discharge tests. Battery performance is highly temperature-sensitive, particularly for lead-acid, lithium-ion, and Ni-Cd chemistries. At High Temperatures: Battery capacity appears higher because chemical reactions speed up. Can lead to overestimation of real-world performance. Increases the risk of thermal runaway or cell damage. At Low Temperatures: Capacity drops due to slower electrochemical activity. May result in underestimated performance and early cut-off in tests. Internal resistance rises, leading to voltage drops under load. Deviations from this temperature should be noted and corrected using manufacturer-specified compensation factors or software. KPM’s battery discharge testers and analyzers include temperature monitoring sensors. The system records ambient and cell temperatures during testing and can apply correction factors to ensure accurate capacity evaluation under varying environmental conditions. 88 8. What are the typical test voltages and frequencies used in VLF cable testing for 11 kV and 33 kV cables? For 11 kV cables, the VLF test voltage typically ranges from 15 kV to 33 kV, depending on the test type—diagnostic tests usually use about 1.5 times the rated voltage (around 16.5 kV), while withstand tests may apply up to 2.5 to 3 times the rated voltage (up to ~33 kV). For 33 kV cables, the test voltage typically ranges from 45 kV to 75 kV, with diagnostic tests at around 1.5 times the rated voltage (approximately 49.5 kV), and withstand tests potentially up to 2.5 times rated voltage (about 82.5 kV), though the upper limit depends on cable specifications and standards. In both cases, the frequency used is very low—typically 0.1 Hz—to reduce capacitive currents and minimize heating during testing, making it safe and effective for long cable lengths. 89 What is Acoustic Emission for PD Detection – Emerging Trends? Acoustic Emission (AE) is an emerging technique in Partial Discharge (PD) detection, leveraging sound waves generated by PD activity within high-voltage equipment. AE sensors capture ultrasonic emissions, allowing non-intrusive, real-time monitoring of insulation health. Recent trends include the integration of AI algorithms for noise discrimination, wireless AE sensor networks for wide-area monitoring, and hybrid systems combining AE with UHF or HFCT methods for higher accuracy. KPM’s PD monitoring device incorporates these advancements by using sensitive AE sensors to detect PD in transformers, switchgear, and cable terminations. The system filters external noise and correlates AE signals with discharge activity, ensuring precise fault localization. Its compact design, cloud integration, and user-friendly interface make it suitable for continuous condition monitoring. This enables utilities to predict insulation failure early, plan timely maintenance, and improve grid reliability while aligning with modern digital substation standards. 90 How do we determine end-voltage for discharge cut-off? The end-voltage, or cut-off voltage, is the minimum voltage at which a battery should be discharged to avoid deep discharge damage and to ensure reliable capacity measurement. It is determined based on the battery type, rated capacity, discharge rate (C-rate), and manufacturer specifications. For example, a 12V lead-acid battery typically has an end-voltage of 10.5V (1.75V per cell) at standard rates. Discharging below this threshold can lead to irreversible sulfation, reduced life, or failure. In lithium-ion batteries, cut-off is often set higher (e.g., 2.5V–3.0V per cell) to protect cell chemistry and safety. The correct end-voltage ensures consistent and safe testing across different test cycles. It must also be adjusted for ambient temperature and load current, as higher loads can cause greater voltage sag. KPM’s discharge kits allow users to program end-voltage settings per battery specs. The system automatically halts testing at the preset voltage to prevent over-discharge and protect battery health. 91 Do you know Battery Test Protocols According to IEC/UN38.3 Standards ? Battery safety and performance testing follow strict protocols defined by IEC standards (e.g., IEC 62133, IEC 62660) and UN38.3, which governs the safe transport of lithium batteries. These protocols ensure batteries can withstand mechanical, electrical, and environmental stress. Key UN38.3 tests include: Altitude simulation Thermal cycling Vibration and shock resistance External short circuit Overcharge and forced discharge Impact/crush test IEC standards add protocols for electrical performance, insulation resistance, and endurance cycling. Each test is designed to validate battery integrity, prevent fire or explosion risks, and ensure global compliance for transport and use. KPM’s battery testing systems are built to comply with these standards, offering programmable test sequences, automated data logging, and safety cutoffs. This enables manufacturers and labs to efficiently validate battery packs for EVs, consumer electronics, and storage systems before certification and deployment. 92 Qu'est-ce qui est le plus important, un logiciel avancé ou un matériel puissant dans la sélection d'un kit de test de relais automatique ?" Un matériel puissant est le plus important pour la robustesse à long terme d'un kit de test de relais, peu d'applications ont également besoin de sources de haute puissance. Un logiciel avancé est un outil qui aide l'utilisateur à tester même les relais les plus complexes de la manière la plus simple. Par conséquent, dans le scénario d'aujourd'hui, le kit de test de relais doit être une combinaison de sources de haute qualité et de logiciels avancés. K3063i est une bonne combinaison pour les deux 93 What to Watch Out For while working on PD Testing in Motors and Generators ? Partial Discharge (PD) testing in motors and generators is critical for identifying early insulation deterioration, especially in high-voltage rotating machines. Key factors to watch out for include surface discharge near end windings, slot discharges, and internal PD caused by insulation voids. External noise interference, poor sensor placement, and incorrect test settings can lead to false readings or missed defects. It’s essential to differentiate between actual PD signals and electrical noise, especially in operational (online) testing. KPM’s PD tester addresses these challenges with high-frequency current transformer (HFCT) sensors, advanced noise separation algorithms. The device enables clear PD signal capture even in electrically noisy environments. It provides real-time analysis, waveform capture, and trend data, helping maintenance teams make informed decisions. KPM’s compact, rugged design and intuitive interface make it ideal for field diagnostics in motors and generators across power plants and industrial sites. 94 9. How do environmental factors affect VLF, Tan Delta, and PD test results? Environmental conditions like temperature, humidity, and soil moisture can significantly impact VLF, Tan Delta, and Partial Discharge (PD) test results. Temperature: Higher temperatures generally reduce insulation resistance and can increase Tan Delta values and PD activity due to increased molecular activity in the insulation. Low temperatures can raise resistance but might mask some defects. Humidity and Moisture: Moisture ingress lowers insulation resistance and increases dielectric losses, causing higher Tan Delta readings and more PD activity. Wet conditions can lead to more apparent insulation degradation during testing. Soil Conditions: For underground cables, soil resistivity and moisture affect grounding and test current paths, influencing VLF and PD measurements. Dry or rocky soils may lead to higher resistance readings. Surface Contamination: Dirt, oil, or salts on cable surfaces can cause surface discharges, impacting PD and Tan Delta results. Because of these factors, it’s important to consider and document environmental conditions during testing and, where possible, perform tests under similar conditions for consistent trending and accurate diagnostics. 95 How are errors in energy meters identified and corrected during calibration? During calibration, errors in energy meters are identified by comparing the meter’s recorded energy values to those of a highly accurate reference standard under controlled test conditions. The percentage difference between the meter reading and the reference reading reveals the magnitude and direction of the error. If errors exceed acceptable limits defined by standards, corrective actions may include: Adjustment: For mechanical meters, physical adjustments (like repositioning the dial or adjusting the braking magnet) can reduce errors. Reprogramming or firmware updates: For electronic meters, software recalibration or parameter tuning may correct measurement deviations. Component replacement: Faulty parts, such as sensors or electronic modules, may be replaced to restore accuracy. Rejecting the meter: If the errors cannot be corrected within tolerance, the meter may be deemed unfit for use. After correction, the meter is re-tested to confirm that errors now fall within the required accuracy class, ensuring reliable measurement and billing. 96 Generators, Power & Electrical Plants:- Top Brands: Siemens Energy (Germany) – Turbines, generators MAN Energy Solutions – Large engines and gensets MTU (Rolls-Royce Power Systems) – Diesel generators AEG Power Solutions (Germany) – Power electronics HITZINGER (Austria) – Rotary UPS, alternators Request form 97 How to Interpret Insulation Resistance Test Results? Insulation resistance (IR) testing assesses the quality of insulation in electrical equipment by measuring its resistance to current flow. IR testing helps detect insulation weaknesses before they lead to equipment failure, short circuits, or electrical shocks. The test measures the resistance between conductors (e.g., wires) or between a conductor and ground, indicating how well the insulation is preventing current leakage. Interpreting these results involves understanding the expected values, identifying trends, and recognizing factors that can affect the readings. A high insulation resistance (in the megaohms or higher) generally indicates good insulation, while low readings suggest potential problems like moisture, contamination, or damage.. It is typically conducted using a megohmmeter at voltages like 500V, 1kV, or 5kV. Higher resistance values (in megaohms or gigaohms) indicate good insulation, while lower values suggest moisture ingress, dirt, or insulation deterioration. Acceptable IR values vary by equipment type, but a general rule is 1 MΩ per kV of operating voltage, with time-based readings (1 min, 10 min) used to calculate the polarization index (PI). A PI > 2 indicates good insulation; < 1.5 may signal problems. KPM offers reliable insulation resistance testers with digital displays, automatic PI/ DAR calculation, and high-voltage test capabilities (up to 20kV). Compliant with IEC and IEEE standards, KPM’s instruments ensure precise diagnosis. KPM also provides training and expert support to help customers accurately interpret IR results for preventive maintenance and asset safety. 98 Difference between Circuit Breaker Analyzer and Manual Timer – Pros & Cons? Circuit Breaker Analyzer Pros: High accuracy and repeatability Measures multiple parameters (timing, coil current, contact resistance) Data logging and analysis software Detects subtle faults and trends Faster and safer testing Cons: Higher initial cost Requires some training to operate Manual Timer Pros: Low cost and simple to use Portable and no power needed Cons: Limited accuracy and precision Measures only basic open/close timing No data recording or advanced diagnostics Prone to human error KPM provides advanced analyzers that save time, improve safety, and offer detailed diagnostics for better maintenance decisions. 99 Pourquoi les kits de test de relais Kingsine ont la puissance nominale la plus élevée du marché ? Dans Kingsine, chaque source de courant est de 480 VA à 35 A et la source de tension est de 124 VA à 310 V, donc la plus élevée du marché. 100 How to Interpret PD Signals? Interpreting Partial Discharge (PD) signals is crucial for diagnosing insulation issues accurately. Real-world case studies reveal that many failures arise not from PD presence, but from misinterpretation. In one case, a generator end-winding PD signal was mistaken for noise due to poor sensor grounding. Another involved a cable joint where increasing PD magnitude over time indicated a void-related breakdown—early intervention prevented a costly outage. Key learnings include the importance of phase-resolved PD (PRPD) pattern analysis, baseline signal comparison, and monitoring PD trends over time. Environmental noise, load conditions, and sensor placement significantly impact data quality. KPM’s PD tester simplifies interpretation with built-in PRPD pattern recognition, automated classification, and trend analytics. Its intelligent algorithms filter out noise and identify critical PD types—internal, surface, or corona—with high accuracy. By offering both real-time insights and historical tracking, KPM's tester empowers engineers to make confident maintenance decisions and extend asset life. 101 What is Electrical Oil Testing According to ASTM/IEC Standards? Electrical insulating oils play a critical role in cooling and insulating transformers, circuit breakers, and other high-voltage equipment. Electrical oil testing, particularly for transformer oil, is crucial for assessing its performance and detecting potential issues. Various ASTM and IEC standards govern these tests, ensuring consistent and reliable results. These standards cover a range of properties like dielectric breakdown voltage, acidity, moisture content, and more. Key ASTM and IEC Standards for Electrical Oil Testing: 1. Dielectric Breakdown Voltage: IEC 60156: Specifies the method for determining the dielectric breakdown voltage of insulating liquids at power frequency. This test is vital for assessing the oil's ability to withstand electrical stress. ASTM D877: Another standard for determining dielectric breakdown voltage, using disk electrodes. ASTM D1816: Uses VDE electrodes for the same purpose. 2. Moisture Content: IEC 60814: Specifies the method for determining the water content in insulating liquids. 3 . Acidity (Neutralization Value): IEC 62021-1: Provides the standard for determining the acidity of insulating liquids. 4. Dissolved Gas Analysis (DGA): While not explicitly mentioned in the provided context, DGA is a crucial test for identifying potential problems like overheating or arcing within a transformer. 5. Other Important Tests: IEC 60422: Covers various aspects of insulating oil, including appearance, color rating, and sludge content. ASTM D1500: Specifies the method for determining the color of petroleum products. Interfacial Tension (ASTM D971): Indicates the presence of soluble contaminants. Resistivity (IEC 60247): Measures the oil's ability to resist electrical current flow. Dissipation Factor (IEC 60247): Indicates the energy loss in the oil due to dielectric losses. Flash Point (ASTM D92, ASTM D93): Determines the temperature at which the oil will ignite. Pour Point (ASTM D97): Indicates the lowest temperature at which the oil will flow. Viscosity (ASTM D445): Measures the oil's resistance to flow. KPM provides a comprehensive range of oil testing instruments aligned with ASTM and IEC standards. These include BDV testers, Tan Delta analyzers, moisture testers. KPM also offers calibration, on-line testing, and training services, ensuring users maintain transformer health and meet regulatory requirements effectively. 102 How to Extend EV Battery Life Through Better Testing? Extending the life of an EV battery begins with smart, proactive testing practices throughout the battery’s lifecycle—from development to daily use. Key strategies include: Accurate SoH & Capacity Testing: Regularly monitor State of Health (SoH) and capacity using controlled charge/discharge cycles to detect early degradation and prevent overuse of weak cells. Cell Balancing Verification: Use testers to identify and correct imbalances, ensuring even load distribution and avoiding stress on individual cells. Thermal Profiling: Monitor temperature behavior under load to detect hotspots or cooling issues that accelerate aging. Internal Resistance Checks: Periodic impedance testing identifies cells with rising resistance—a sign of aging or failure. Simulated Real-World Load Testing: Evaluate performance under actual driving conditions to optimize BMS tuning and charging protocols. KPM’s battery testing solutions support all of the above, offering automated diagnostics, real-time analytics, and precision control. This helps EV manufacturers and service centers maximize battery life, reduce failures, and enhance long-term performance. 103 10. What are the safety precautions and best practices during VLF and PD cable testing? Ensure Proper Training: Only qualified personnel familiar with high-voltage testing and equipment should conduct tests. Use Appropriate PPE: Wear insulated gloves, safety glasses, and flame-resistant clothing. Clear the Test Area: Establish a safe perimeter with warning signs and barriers to prevent unauthorized access during testing. Verify Equipment Condition: Check all test instruments, leads, and connections for damage before use. De-energize and Ground Cables: Ensure the cable is disconnected from the power system and properly grounded before connecting test equipment. Follow Manufacturer Guidelines: Use the recommended test voltages, durations, and procedures specific to the cable type and equipment. Monitor Test Parameters: Continuously observe voltage, current, and PD activity during the test to detect abnormalities early. Avoid Testing in Hazardous Environments: Do not perform tests during storms, wet conditions, or explosive atmospheres. Record Test Data Accurately: Document all parameters, environmental conditions, and observations for traceability and analysis. Emergency Preparedness: Have clear procedures for immediate shutdown and emergency response in case of equipment failure or personnel hazard. Following these precautions ensures safety and reliable test results while protecting both personnel and equipment. 104 Key Categories of Used Printing Machines: 1. Offset Printing Machines Used for high-volume, high-quality printing (books, magazines, brochures, packaging).Sheet-fed Offset. Brands: Heidelberg (e.g., SM 74, CD 102 series) KBA (Koenig & Bauer) MAN Roland Features: 2 to 8 color units, high-speed (up to 18,000 sheets/hr) Use: Commercial printing, packaging, brochures Web-fed Offset Used for newspapers and long-run publications Brands: Goss, Manroland Web Systems. 2. Flexographic Printing Machines: Used for packaging materials: labels, bags, pouches, corrugated cartons. Brands: Windmöller & Hölscher (W&H) Bobst Comexi (Spain) Printing Substrates: Plastic film, paper, foil, etc. Feature: Roll-to-roll printing, quick-drying inks 3. Gravure Printing Machines: Used for high-quality, long-run packaging printing (magazines, foils). Brands: Rotomec (Italy) Cerutti (Italy) KBA (Germany) 4. Label Printing Machines Ideal for self-adhesive labels, shrink sleeves, and narrow web printing. Brands: Gallus (Switzerland) Mark Andy Nilpeter OMET (Italy) Technologies: Flexo, UV flexo, digital hybrid 5. Digital Printing Machines: For short-run, fast-turnaround jobs (variable data, photos, small runs). Brand: HP Indigo Digital Printing Machines Konica Minolta Xerox Canon Applications: Book-on-demand, labels, business cards 6. Screen Printing Machines Used for textiles, labels, circuit boards, and special surfaces. Brands: Sakurai ATMA Thierry (Germany) 7. Other Auxiliary Machines Cutting Machines: Polar (Germany), Wohlenberg Cutting Machines: Polar (Germany), Wohlenberg Die-Cutting / Folder-Gluers: Bobst, Heidelberg UV Coaters, Embossers Request form 105 How Temperature and Environment Affect CB Test Results ? Temperature Effects: Cold temperatures can stiffen mechanical parts, causing slower operations and longer timing. High temperatures may reduce coil resistance, affecting current measurements. Extreme temps can alter contact resistance readings due to material expansion or contraction. Environmental Factors: Humidity can cause corrosion or moisture ingress, affecting insulation and contacts. Dust and contaminants can interfere with mechanical movement or electrical contacts. Vibrations or electromagnetic interference may distort sensitive measurements. 106 How can test data be used to predict battery end-of-life? Battery test data—such as internal resistance, voltage, capacity, and temperature trends—can be analyzed over time to accurately predict end-of-life (EOL). A consistent increase in internal resistance and decline in capacity (Ah) are key indicators of aging. When a battery can no longer deliver at least 80% of its rated capacity, it is generally considered at the end of its useful life. Regular discharge tests and impedance measurements create a performance history that reveals degradation rates, enabling predictive analytics. By identifying abnormal changes, such as faster resistance rise in one cell compared to others, maintenance teams can isolate failing units early. Trend-based monitoring allows scheduling replacements before failures occur, ensuring reliability in critical applications. KPM’s analyzers and discharge kits offer data logging, graphing, and reporting features that help utilities and industries track battery health over time, enabling data-driven EOL prediction and proactive asset management. 107 Pourquoi Kingsine K3063i est la meilleure combinaison de puissance et de précision ? K3063i a une source de tension et de courant à haute puissance (la source de courant est de 480 VA à 35 A et la source de tension est de 124 VA à 310 V) alors qu'il a une plage de courant de 3 A, ce qui conduit à une très grande précision dans les courants plus faibles. 108 How to measure oil density and what are its implications? Oil density is the mass per unit volume (typically expressed in kg/m³ or g/cm³) and is a key parameter in evaluating the quality and type of insulating oils used in transformers and electrical equipment. Measuring oil density helps in determining its composition, potential uses, and potential for refining into various products like gasoline, diesel, or asphalt. Changes in oil density can indicate contamination, degradation, or improper formulation, affecting cooling efficiency, dielectric strength, and compatibility with equipment materials. Accurate density measurement is essential during oil processing, quality checks, and routine maintenance. It is often performed at a standard reference temperature (usually 15°C or 20°C) using digital density meters or hydrometers, in line with ASTM D4052 or ISO 12185 standards. KPM offers precise digital density meters and oil analysis kits compliant with international standards. These tools are designed for ease of use, fast operation, and high accuracy. With additional support like calibration services and technical guidance, KPM ensures reliable oil density measurement, aiding customers in maintaining transformer performance and operational safety. 109 Do you know the Evolution of Battery Testing Equipment in the EV Era? With the rise of electric vehicles (EVs), battery testing equipment has evolved from basic voltage and capacity checkers to smart, multifunctional diagnostic platforms. Early systems focused on simple charge/discharge cycles, but modern EV batteries demand high-precision testing for complex parameters like State of Health (SoH), internal resistance, cell balancing, and thermal behavior. Today’s equipment supports high-voltage, multi-channel testing, fast data logging, and automated test protocols aligned with IEC and UN38.3 standards. Integration with Battery Management Systems (BMS), cloud connectivity, and AI-driven analytics are now standard, enabling predictive maintenance and lifecycle optimization. KPM’s battery testing solutions reflect this evolution by offering advanced tools for real-time monitoring, constant current testing, leakage detection, and cell balancing verification. Built for R&D, manufacturing, and service centers, KPM's systems ensure safety, accuracy, and performance—essential in the fast-paced EV ecosystem. 110 What are the Early Warning Signs from Your Oil Particle Counter? An oil particle counter detects and quantifies solid contaminants in insulating oil, providing early warning signs of equipment wear, insulation breakdown, or external contamination. Key indicators include: Rising Particle Counts: A sudden increase in particles, especially >4µm or >6µm, can signal insulation aging, arcing, or mechanical wear. Shift in Particle Size Distribution: A higher concentration of larger particles may indicate internal component failure. Exceeding ISO 4406 Cleanliness Codes: Values outside acceptable limits suggest a decline in oil cleanliness, potentially leading to reduced dielectric strength and accelerated aging. Regular monitoring allows for trend analysis, helping prevent failures before they occur. KPM provides portable and lab-grade oil particle counters aligned with ISO 4406 and NAS 1638 standards. These instruments offer accurate, real-time data for critical decision-making. Combined with expert support and service, KPM enables power utilities and industries to ensure oil cleanliness and extend equipment lifespan. 111 Qui contacter pour tout support d'équipement de test KPM ? N'hésitez pas à contacter notre consultant technique sur Consultant@kpmtek.com pour toute question. 112 Why Your Battery Test Bench Might Be Giving False Results? False results from a battery test bench can arise due to calibration errors, inaccurate sensor placement, or improper test conditions. If the voltage or current sensors are not calibrated regularly, readings may drift, leading to incorrect capacity or SoH measurements. Poor contact resistance at terminals or cables can also distort current flow and voltage drop data. Environmental factors like temperature fluctuations or electromagnetic interference can affect sensitive measurements, especially during internal resistance or impedance tests. Additionally, incorrect test profiles—such as setting the wrong cut-off voltage or charge rate—can lead to misleading performance data. Software issues, such as outdated firmware or poor algorithm tuning, may misinterpret real-time data or fail to filter noise properly. KPM’s battery test benches mitigate these issues with auto-calibration, real-time error detection, and intelligent profiling. They ensure accurate, repeatable results that reflect the true performance and safety status of EV and energy storage batteries. 113 What are the Role of Environmental Factors in Battery Pack Testing? Environmental factors play a crucial role in battery pack testing, as they significantly influence battery performance, safety, and lifespan. Temperature, humidity, and altitude conditions can alter a battery’s behavior under both charge and discharge cycles. Temperature affects chemical reactions inside cells. High temperatures accelerate degradation and risk thermal runaway, while low temperatures reduce capacity and increase internal resistance. Humidity can lead to moisture ingress, causing corrosion or insulation breakdown—especially in poorly sealed packs. Altitude (low pressure) impacts thermal dissipation and can increase the risk of electrolyte leakage or expansion in sealed packs. To ensure reliability, batteries are tested in environmental chambers simulating real-world extremes. IEC and UN38.3 standards mandate such conditions for certification. KPM’s battery testing systems integrate seamlessly with environmental chambers, enabling precise control, real-time monitoring, and automated safety checks—ensuring comprehensive evaluation of battery packs under varied environmental stresses. 114 Où se trouve le centre de service des kits de test de relais Kingsine en INDE ? Nous avons un centre de service avancé à Gurgaon, Haryana avec une disponibilité de pièces de rechange à 100 %. 115 Qu'est-ce que le relais df/dt, puis-je le tester à l'aide des kits de test de relais Kingsine ?" Le relais de taux de changement de fréquence (ROCOF ou df/dt) est utilisé pour un délestage rapide, pour accélérer le temps de fonctionnement dans les situations de sur et sous-fréquence et pour détecter la perte de réseau. Les relais ROCOF ou df/dt sont particulièrement efficaces pour arrêter l'effondrement de fréquence d'un réseau en cas de perte brutale de production majeure. En effet, en mesurant le taux de décroissance de la fréquence, l'action corrective peut être initiée bien avant le moment où la fréquence de l'interconnexion synchrone aurait réellement chuté à un point auquel les relais de sous-fréquence du générateur ou les auxiliaires de l'unité se déclencheraient / fonctionneraient, ce qui entraînerait un arrêt complet du système. Le df/dt est utilisé pour le délestage dans des situations où une perte soudaine de capacité de production sur un système s'accompagne d'une diminution de la fréquence du système. Dans une telle situation d'inadéquation de la génération de charge, la fréquence du système a tendance à baisser. Le relais df/dt peut commander les disjoncteurs et permettre de déconnecter les départs du réseau, un par un. Dans Kingsine Software, il existe un module spécialisé pour tester df/dt 116 What is Li-ion Cell Grading: How to Do It Right? Li-ion cell grading is the process of evaluating and categorizing cells based on their performance parameters to ensure uniformity in battery pack assembly. Doing it right involves a systematic and precise testing protocol: Key Steps in Proper Cell Grading: Initial Voltage & IR Check: Measure open-circuit voltage and internal resistance to identify defective or aged cells. Capacity Testing (Constant Current Discharge):Discharge cells under a controlled current and record actual capacity (Ah) against rated values. Cycle Performance Evaluation: Charge/discharge cycles help verify stability and consistency across multiple uses. Temperature Monitoring: Track thermal response under load—abnormal heating indicates inefficiency or cell faults. Sorting Criteria: Classify cells based on capacity, IR, voltage behavior, and thermal stability into A, B, C grades. KPM’s cell grading systems offer multi-channel, high-precision testers with automated sorting, real-time data logging, and user-defined grading profiles. This ensures consistent cell performance, longer pack life, and optimal safety for EV and energy storage applications. 117 Difference between Battery Testing for Aerospace and Automotive Applications? Battery testing for aerospace and automotive applications differs significantly due to varying performance, safety, and environmental requirements. Aerospace batteries demand extreme reliability, lightweight design, and operation under harsh conditions like high altitude, vibration, and temperature extremes. Testing includes rigorous altitude simulation, thermal vacuum, and shock/vibration endurance to meet standards like RTCA DO-311 and MIL-STD. In contrast, automotive EV batteries focus on cycle life, thermal management, and high-power performance. Tests involve real-world drive simulation, fast charging analysis, thermal profiling, and compliance with UN38.3, IEC 62660, and ISO 26262. KPM’s testing solutions cater to both sectors with customizable test protocols, environmental chamber integration, and real-time monitoring. For aerospace, KPM offers high-precision, lightweight diagnostics; for automotive, it provides high-throughput, high-current testing systems—ensuring safety, efficiency, and regulatory compliance across industries. 118 Qu'est-ce qu'un relais de distance, quels kits de test de relais peuvent tester ces relais ?" Un relais de distance/relais d'impédance est un relais de surintensité à tension restreinte. Le relais mesure l'impédance jusqu'au point de défaut et donne une commande de déclenchement si cette impédance est inférieure au réglage du relais Z. Le réglage du relais Z est connu sous le nom d'impédance de réplique et il est proportionnel à l'impédance définie, c'est-à-dire l'impédance jusqu'à la portée du relais . Le relais surveille en permanence le courant de ligne I via CT et la tension de bus V via PT et fonctionne lorsque le rapport V/I tombe en dessous de la valeur définie. Dans Kingsine, les K68i et K3063i disposent de modules spécialisés pour tester les relais de distance. 119 End-of-Life Testing for Electric Vehicle Batteries? End-of-life (EOL) testing for electric vehicle (EV) batteries is essential to assess whether a battery can be reused, repurposed, or must be recycled. This testing focuses on determining the State of Health (SoH), remaining capacity, internal resistance, and thermal behavior after prolonged use. Key EOL testing steps include: Capacity Test: Measures actual ampere-hours (Ah) to determine if it meets minimum reuse thresholds (typically ≥70% of original). Impedance Measurement: Identifies internal degradation and cell imbalance. Charge/Discharge Cycle Analysis: Evaluates efficiency and detects abnormal voltage drops or thermal spikes. Thermal Performance Check: Assesses safety risks under load. Leakage and Insulation Tests: Ensures physical and electrical integrity. KPM’s battery EOL testing systems automate these processes with real-time monitoring, trend analysis, and safe discharge protocols. This enables accurate decision-making for second-life applications, such as stationary storage, or safe recycling, aligning with circular economy goals. 120 Pourquoi un kit de test de relais haute puissance est nécessaire pour tester un relais électromécanique Les relais électromécaniques ont des bobines à haute impédance, pendant le test, le kit de test de relais doit injecter du courant via des bobines à haute impédance, d'où une charge élevée est nécessaire. Les kits Kingsine ont la charge la plus élevée et sont donc idéaux pour tester tous les types de relais. 121 What do you mean by Understanding the Thermal Runaway Effect? End-of-life (EOL) testing for EV batteries is crucial to determine whether a battery should be reused, repurposed, or recycled. This involves evaluating the battery’s State of Health (SoH), residual capacity, internal resistance, and thermal behavior. Typically, a battery is considered at end-of-life when its usable capacity drops below 70–80% of its original rating. EOL testing includes controlled charge/discharge cycles, impedance analysis, and thermal profiling under simulated real-world loads. It also verifies the integrity of the Battery Management System (BMS) and checks for cell imbalance, swelling, or leakage. This testing helps classify batteries for secondary applications like energy storage or ensures safe recycling of critical materials. KPM’s battery testing systems provide automated, accurate EOL assessment with programmable protocols, multi-parameter monitoring, and safety interlocks, enabling OEMs and recyclers to make informed decisions about battery reuse, life extension, or disposal. 122 Qu'est-ce que la fonction de lecture transitoire avancée du kit de test de relais automatique ? De nos jours, tous les relais avancés sont livrés avec une fonction d'enregistrement de défauts. Chaque fois qu'un défaut survient, ce fichier de défaut est enregistré dans le relais sous la forme d'un fichier .cfg/comtrade. Le kit de test de relais a la fonction d'importer ce fichier dans son logiciel et de rejouer le fichier en utilisant ses sources de courant et de tension. C'est ce qu'on appelle la fonction de lecture transitoire. 123 Difference between Battery Energy Density and Safety: A Testing Perspective? As energy density increases in lithium-ion batteries to meet the demands of EVs, aerospace, and portable electronics, safety risks also rise. Higher energy density means more power is stored in the same space, which can lead to thermal runaway, fire, or explosions if not properly managed. From a testing perspective, it is critical to balance performance with safety through: Thermal abuse tests to simulate overheating Overcharge/overdischarge tests to detect BMS failure scenarios Short-circuit and impact testing to assess mechanical protection Internal resistance and SoH testing to identify degradation risks early Leakage and enclosure integrity tests to prevent moisture or gas ingress Testing protocols per UN38.3, IEC 62133, and UL 2580 ensure that high-energy cells meet strict safety thresholds. KPM’s battery testing solutions are designed to test both high-capacity and high-safety requirements, providing real-time monitoring, automated safety shutdowns, and environmental stress simulations to ensure safe, high-density battery deployment. 124 Quelles sont les précautions avec les connexions à garder à l'esprit lors de l'utilisation du kit de test de relais ? Peu de précautions du site sont - : Toutes les bornes CT et PT qui doivent être connectées au kit de test de relais ne doivent pas être sous tension. La mise à la terre doit toujours être connectée au kit. Pendant les tests, les équipements de surtension tels que les kits de soudage doivent être évités dans le même circuit d'alimentation que le kit de test de relais. Toujours travailler selon les normes de test locales ou internationales pertinentes. 125 What Makes a Good Battery Service Center? A good battery service center combines technical expertise, advanced diagnostic tools, and safety-first practices to ensure efficient and reliable battery maintenance. Key qualities include: Skilled Technicians trained in EV, industrial, and energy storage battery systems. Advanced Testing Equipment for SoH analysis, cell balancing, IR testing, and BMS diagnostics. Safety Protocols including insulation resistance checks, thermal monitoring, and ESD protection. Data-Driven Diagnostics using software tools for real-time monitoring and historical performance tracking. Proper Infrastructure, such as ventilated workspaces, fire suppression systems, and isolation zones for damaged packs. Support for Multiple Battery Chemistries and pack configurations. 126 Quel type de fonctions de protection existe-t-il dans les kits de test de relais automatique Kingsine ? Les kits de test de relais Kingsine ont des protections inférieures La protection contre les courts-circuits a des amplificateurs de tension Protection contre les circuits ouverts pour les amplificateurs de courant Protection contre la surchauffe. Indication Terre Santé etc. 127 Je veux tester des relais différentiels, quel type de kit de test de relais me convient le mieux ? Pour tester un relais différentiel sur une base triphasée, nous avons besoin d'un kit de test de relais à 6 sources de courant, c'est-à-dire K3063i, nous pouvons tester un relais différentiel phase à phase en utilisant également un kit de test de relais à 3 sources de courant, K68i 128 Qu'est-ce que le kit Tan Delta, le test Tan Delta | Test d'angle de perte | Test du facteur de dissipation" Un isolant lorsqu'il est connecté entre la ligne et la terre, il se comporte comme un condensateur avec un certain effet de résistance à cause des impuretés. Tan delta est le rapport du courant résistif (Ir) au courant capacitif W.R.T (Ic) 129 Le KPM-TD12 est-il difficile à utiliser ?" _d04a07d8-9cd1-3239-9149 -20813d6c673b_KPM TD 12 est un kit delta tan puissant avec une utilisation plus simple. Pour toute clarification, n'hésitez pas à contacter notre consultant technique sur consultant@kpmtek.com 130 Quel équipement peut être testé à l'aide du kit de test Tan delta - KPM TD12. Le KPM TD 12 est capable de tester les transformateurs de puissance (BT, HV et EHV), les TC, les PT, les condensateurs de classement, etc. Le KPM TD12 peut également être mis à niveau pour tester les tests Oil Tan Delta et Generator Tan Delta. 131 Pourquoi avons-nous besoin d'un arrangement/d'accessoires séparés pour effectuer le test Tan Delta de Generators . La capacité de quelques générateurs est très élevée, par conséquent leur courant de fuite est hors de portée des sources d'alimentation internes des kits tan delta. Pour effectuer des tests tan delta des générateurs, différents fabricants ont différentes méthodes telles que l'inductance résonnante ou les sources d'alimentation externes, etc. 132 Comment pouvons-nous tester Oil Tan Delta en utilisant le kit de test KPM TD 12 Tan delta ? Nous pouvons connecter une cellule de test d'huile au KPM TD 12 qui chauffe l'échantillon d'huile et effectue les tests tan delta conformément aux normes internationales. 133 Le KPM TD12 est-il un équipement encombrant avec des dimensions et un poids énormes ? KPM TD12 ne pèse que 28 kg avec les dimensions les plus petites par rapport à ses pairs, c'est-à-dire. 350 mm (L) × 270 mm (L) × 270 mm (H) La portabilité en fait l'un des équipements les plus appréciés pour voyager, très apprécié par les clients en mouvement. KPM TD 12 lorsqu'il est monté sur un JUMBO TRUCK est très facile à déplacer même dans des conditions de sol inégales de sous-station avec tous les arrangements d'outils, de tambours de câbles HT et BT et de connecteurs. 134 J'ai des doutes sur les connexions de KPM TD12, qui contacter ?" Les connexions sont très critiques lors des tests Tan delta. L'idée est de comprendre le chemin du courant de fuite circulant du conducteur HT au conducteur BT via l'isolation. En cas de confusion, n'hésitez pas à contacter notre consultant technique sur consultant@kpmtek.com 135 Le kit KPM-TD 12 Tan delta est-il toujours livré avec un chariot Jumbo Truck ? Jumbo Truck est facultatif, l'utilisateur peut également acheter KPM TD 12 sans Jumbo Truck. Dans ce cas, le client recevra une unité KPM TD12 avec un sac de transport souple avec tous les câbles et accessoires. 136 Quelle est l'utilisation du chariot de camion Jumbo. KPM TD 12 lorsqu'il est monté sur un JUMBO TRUCK est très facile à déplacer même dans des conditions de sol inégales de sous-station avec tous les arrangements d'outils, de tambours de câbles HT et BT et de connecteurs. Jumbo Truck peut être plié à 50 % de sa taille, ce qui en fait également un chariot idéal pour les voyages. Jumbo Truck peut être personnalisé pour n'importe quel produit KPM. 137 Comment effectuer l'étalonnage du KPM TD 12 L'étalonnage du KPM TD12 peut être effectué à l'aide du modèle de condensateur d'étalonnage, KPM SC-100pF, un condensateur standard de 10 KV, 100pF 138 Quel type de CT peut être testé par KPM CT PT Analyzer ? KPM CT PT Analyzer est capable de tester presque tous les types de TC et PT, y compris les TC de mesure et de protection. En termes d'applications, tous les types de TC utilisés dans la distribution, la transmission et la production d'énergie peuvent être testés à l'aide de KPM CT/PT Analyzer. Les TC d'application spéciale tels que le TC annulaire de conduit de bus, le TC de douille de transformateur peuvent également être testés. KPM CT PT Analyzer peut tester un PT & CVT en utilisant également un accessoire amplificateur de tension. 139 L'analyseur KPM CT PT Analyzer peut-il tester les TC de gaine de bus de générateur ? Oui, l'analyseur KPM CT PT peut tester à la perfection les TC du conduit de bus de générateur. 140 L'analyseur KPM CT PT Analyzer peut-il tester les TC de douille de transformateur de puissance ? Oui, l'analyseur KPM CT PT Analyzer teste à la perfection les TC de douille de transformateur de puissance. 141 Pourquoi le test d'un CT de traversée de transformateur de puissance est une affaire complexe pour tout équipement de test CT ? L'analyseur KPM CT PT fonctionne sur le principe de la méthode du rapport de tension. Lors du test d'un TC de traversée de transformateur de puissance, le circuit primaire est connecté en série à l'enroulement du transformateur de puissance, ce qui rend le test complexe. L'analyseur KPM CT PT, à l'aide de son circuit de réduction du bruit, est capable de tester à la perfection le CT de la douille du transformateur de puissance. 142 Quel est le point de coude le plus élevé testé par l'analyseur KPM CT PT. KPM CT PT Analyzer sature le cœur des TC avec un point de coude élevé en utilisant le principe de réduction de fréquence. Ainsi, il peut pratiquement tester le coude de tous les types de TC de protection THT en utilisant sa source basse tension. Théoriquement, il peut tester même 35KV Kneepoint. 143 L'analyseur KPM CT PT est-il portable ? L'analyseur KPM CT PT est hautement portable avec une taille (WXHXD) en mm 485 X 356 X 183 et un poids < 15Kg. Cela en fait un équipement idéal pour voyager avec. 144 Quel type de clients du secteur de l'énergie utilise KPM CT PT Analyzer L'analyseur KPM CT PT est utilisé par tous les types de clients qui sont dans la génération, la transmission ainsi que la distribution d'énergie. 145 Pouvons-nous mesurer la résistance primaire et secondaire d'un PT à l'aide de l'analyseur KPM CT PT La résistance de l'enroulement primaire du PT est en Kohms. L'analyseur KPM CT PT a une plage de résistance en Kohms, à l'aide de laquelle il peut facilement tester la résistance primaire d'un PT. La résistance secondaire du PT est en ohms et peut être facilement testée. 146 Pouvons-nous obtenir une courbe d'hystérésis d'un CT en utilisant l'analyseur KPM CT PT Oui, l'analyseur KPM CT PT dispose d'une fonction de courbe d'hystérésis. À la fin du test, la courbe d'hystérésis du TC est calculée, ce qui montre clairement les caractéristiques de perte de puissance du TC testé. 147 Qu'est-ce que la courbe d'hystérésis et quelle est sa pertinence La magnétisation des substances ferromagnétiques due à un champ magnétique variable est en retard par rapport au champ. Cet effet est appelé hystérésis, et le terme est utilisé pour décrire tout système dont la réponse dépend non seulement de son état actuel, mais aussi de son historique passé. Dans l'analyseur KPM CT PT, la courbe d'hystérésis du CT est calculée, la largeur de la courbe d'hystérésis montre clairement les caractéristiques de perte de puissance du CT sous test. 148 Comment l'analyseur KPM CT PT peut trouver automatiquement une valeur de résistance d'enroulement à 75 °C. L'analyseur KPM CT PT dispose d'un capteur de température intégré à l'aide duquel il mesure la température ambiante au moment du test de résistance d'enroulement. Une fois le test terminé, il affiche la valeur de résistance d'enroulement à température ambiante ainsi que la température de résistance d'enroulement compensée. valeur @ 75'C automatiquement. Cela réduit le risque d'erreur humaine due à la saisie manuelle des données de température. 149 Qu'est-ce que le test de charge secondaire CT et quelle est sa pertinence Tous les types de TC et PT sont conçus pour supporter une charge fixe. Si la charge connectée d'un TC est supérieure à la charge requise, la sortie du TC ne sera pas conforme aux spécifications et une erreur sera introduite. L'analyseur KPM CT PT dispose d'une fonction de test de charge dans laquelle l'analyseur KPM CT PT trouve la VA de la boucle complète du conducteur. 150 Quel test peut être réalisé avec l'analyseur KPM CT PT ? Le test ci-dessous peut être effectué sur CT et PT à l'aide de KPM CT / PT Analyzer Tests pour Transformateur de courant : Courbe d'excitation et test des paramètres Test de rapport de virage Test d'erreur de rapport et de phase Vérification de la marque de polarité Mesure de résistance de bobine Mesure de la charge de la boucle secondaire Test de courbe de ligne d'erreur pour TC de protection Test des paramètres CT transitoires Conjecture de plaque signalétique CT Mesure de courbe de boucle d'hystérésis de saturation Tests pour transformateur de tension : Test d'erreur de rapport de tours et d'angle de phase Test de polarité Test de charge secondaire Test de résistance d'enroulement

Each product supplied by KPM undergoes a series of lab & field testing trials. Performance of equipment is closely monitored in rigorous field trials under stringent conditions. Once the equipment passes through these trials, then it is launched in the market .   Trust Shield is an initiative to quantify the testing outcomes. Trust shield is a way to impart transparency to customer's purchase process.  BOUCLIER DE CONFIANCE KPM Une étoile L'équipement avec 1 étoile satisfait aux performances inférieures exigences Plus de 20 essais sur le terrain dans des conditions de site Plus de 100 essais de test dans des conditions de laboratoire Éprouvé sur le marché depuis < 3 ans Dans toutes les exigences ci-dessus, les performances du produit sont surveillées sur la base de : Fiabilité Répétabilité Précision Performance contre l'effet du bruit (Live EHV Switchyards) Robustesse lors des déplacements etc. deux étoile L'équipement avec 2 étoiles satisfait aux performances inférieures exigences Plus de 50 essais sur le terrain dans des conditions de site Plus de 100 essais de test dans des conditions de laboratoire Éprouvé sur le marché depuis plus de 3 ans Dans toutes les exigences ci-dessus, les performances du produit sont surveillées sur la base de : Fiabilité Répétabilité Précision Performance contre l'effet du bruit (Live EHV Switchyards) Robustesse lors des déplacements etc. trois étoile L'équipement avec 3 étoiles satisfait aux performances inférieures exigences Plus de 50 essais sur le terrain dans des conditions de site Plus de 100 essais de test dans des conditions de laboratoire Éprouvé sur le marché depuis plus de 7 ans Dans toutes les exigences ci-dessus, les performances du produit sont surveillées sur la base de : Fiabilité Répétabilité Précision Performance contre l'effet du bruit (Live EHV Switchyards) Robustesse lors des déplacements etc. QUELLE EST LA PERTINENCE DE " TRUST SHIELD " Chaque produit fourni par KPM subit une série d'essais en laboratoire et sur le terrain. Les performances de l'équipement sont surveillées de près lors d'essais rigoureux sur le terrain dans des conditions rigoureuses. Une fois que l'équipement passe par ces essais, il est lancé sur le marché . Trust Shield est une initiative visant à quantifier les résultats des tests. Le bouclier de confiance est un moyen de donner de la transparence au processus d'achat du client. Cela signifie-t-il que 3 étoiles est meilleur que 2 étoiles ? Oui et non, tout équipement avec un KPM TRUST SHIELD 2 étoiles peut être aussi bon qu'un équipement 3 étoiles. nombre d'essais en laboratoire. Le nombre d'étoiles de KPM TRUST SHIELD dépend également de la durée pendant laquelle l'équipement est performant sur le terrain en termes de robustesse et de fiabilité. Tout produit 2 étoiles peut également être classé 3 étoiles s'il fonctionne de manière constante pendant plus de 7 ans.

Our test equipment covers various applications such as relay testing, circuit breaker testing, CT/PT Testing, Earth Testing, Partial Discharge Testing, Transformer Testing, Energy Meter Testing, Li Ion Battery Testing, Utility Battery Testing. SOLUTIONS DE TEST DU SYSTÈME ÉLECTRIQUE Cable LA Meter TRF Relay Machine Battery Testing GIS Circuit Breaker Tap Changer Monitor Testing EV Partial dischage CT/PT Earth testing

KPM India |We are electrical test equipment manufacturers, We deal in CT PT Analyzer, Relay Test Kit , Tan delta , Transformer Test Kits , LA Testers etc.|Intermediate Transformer |https://kpmtek.wixsite.com/website/fr/intermediate-transformer Transformateur intermédiaire