Power Transformer Testing 

Video

FAQ

Theory

Tan Delta Tester

KPM TD-12 is a simple and robust equipment for PF/DF measurements of -: 

  • Power transformers

  • Rotating machines

  • Current transformers

  • Voltage transformers

  • High-voltage (HV) cables

  • Gas-insulated switchgear (GIS) systems

KPM TD-12 with the help of its special design is capable of conducting Tan Delta Testing in highly charged substation environment upto 765KV.

 

Few key points 

  • Testing @10KV/12KV with 0.1KV increment 

  • Freq @45HZ/55HZ ,  47.5HZ/52.5HZ, 55HZ/65HZ,    57.5HZ/62.5HZ, Automatic double frequency 

  • Powerful unit of 2000VA

  • The instrument has many protection measures, such as input voltage fluctuation, output short circuit, over voltage, over current and over temperature.

KPM TD 12 with the help of Optional accessories is capable of testing Tan delta of -: 

  • Transformer Oil with the help of Oil Test Cell 

  • Generators with high capacitance . 

Please feel free to contact for details . 

IR Tester  KPM-5KP+ 

(5KV,10KV,15KV, 20KV series) 

KPM-5KP+ is a robust IR tester with excellent noise reduction circuitry. KPM-5KP+ Tester is having a user selectable voltage ranges  50V, 100V, 250V, 500V, 1.0kV, 2.5kV, 5.0kV.  It is suitable for measuring insulation of switchgears, panels, ct/pt, generators, high voltage electric motors, power capacitors, power cables, surge arresters and other ideal insulation resistance test equipment.

Key features-:

  • PI/DAR facility 

  • Short Ckt Current >5ma

  • Auto- discharge function to make, the operation safe.

  • Inbuilt temperature & humidity sensor.

  • Advance “Guard” Feature for accurate measurements

  • Live circuit warning symbols with audio sounds.

  • Suitable for working on 12V DC adapter (12V/1A) or internal battery

  • Onboard Printer (Optional )

Also available in 10KV , 15 KV & 20KV variants . 

OIL BDV Test Kit 

As the name suggests, Oil BDV Test Set (KPM-OBD80/100+) is used for measuring breakdown strength of the insulating oil.

  • Capable of generating 80/100KV with onboard printer. 

  • Motorized & programmed stirrer 

  • Light Weight 

  • 5KV/sec voltage rise with automatic test plans as per IEC & IS 

  • 0.5KV/sec to 5KV/sec variable voltage rise as per ASTM Standards ( available in "A+"  models)

Transformer Winding Resistance Tester (1 Phase)

KPM offers a complete line of transformer testing equipment The KPM TWRT Series can be classified in terms of below models 

TWRT-2A      ( 2A , 1 Phase Testing )

TWRT-10A    ( 10A , 1 Phase Testing )

TWRT-20A    ( 20A , 1 Phase Testing )

TWRT-40A    ( 40A , 1 Phase Testing )

TWRT-20  ( 40A , 1 Phase Testing & 20A, 3Phase Testing )

.

IR Tester 

KPM-5KP is an easy to use 5KV IR Tester with user selectable voltage ranges  500V,1000V,2500V,5000V.  It is suitable for measuring insulation of switchgears, panels, ct/pt, generators, high voltage electric motors, power capacitors, power cables, surge arresters and other ideal insulation resistance test equipment.

Key features-:

 

  • PI/DAR facility 

  • Short Ckt Current <1ma

  • Auto- discharge function to make, the operation safe.

  • Advance “Guard” Feature for accurate measurements

  • Live circuit warning symbols with audio sounds.

  • Suitable for working 12V DC adapter (12V/1A) or internal battery

Turns Ratio Tester 

KPM-TTR3 is a three phase transformer ratio tester used to measure the voltage ratio of 3 or 1 phase transformer. All the data and test results are showed on a 320*240 LCD. All the test results can be printed onsite by the micro printer . KPM-TTR3 is having a inbuilt memory to save the test results . Advance Noise Reduction circuitry makes KPM-TTR3 an ideal equipment for field conditions.

Transformer Bushing CT

Testing 

KPM-CT/PT Analyzer is an all in one solution for testing all type of CT/PT as per IEC standards. It is an equipment with high ROI ( Return On Investment ) . Below features  make  KPM CT/PT analyzer  and ideal tool for  CT/PT Manufacturer , Testing labs , Substations (Upto 765KV) , Power  Plants  etc.

Now a days many power utilities expect the power transformer manufacturers to conduct the testing of Bushing CT in the fully assembled condition. Since the primary terminals of bushing CT are not directly available ,testing is not possible with the primary current injection method. This test can be easily conducted by CT/PT Analyzer . 

SFRA & Sht. CKt. Impedance

Power transformer is an important electrical equipment, its safe and reliable operation is extremely important for power systems.

 

KPM SFRA+ is developed for testing the mechanical and electrical integrity of power transformers after transportation or exposure to high fault currents. It uses the

  • SFRA principle (Sweep Frequency Response Analysis)  

  • Sht. Ckt. Impedance method  

& measures the electrical transfer function over a wide range of frequencies.

Video - Power Transformer Testing

 

Theory - Power Transformer Testing 

 

High-voltage transformers are some of the most important (and expensive) pieces of equipment required for operating a power system. There are a multitude of checks and tests performed as transformer is assembled at the substation. The test engineer may not directly perform all the following tests and inspections but must be sure they are satisfactorily completed to take a  final decision over transformer bank readiness to be energized.

  • IR Testing

  • Capacitance & Tan Delta

  • Transformer Winding Resistance Tester

  • Transformer Turns Ratio

  • Magnetic Balance Test of Transformer

  • Magnetizing Current Test of Transformer

  • Vector Group Test of Transformer

  • Temperature Rise of Transformer

  • Tap Changer Testing

  • SFRA – Sweep Frequency Response Analyzer

  • Transformer Bushing CT Testing . 

Frequently Asked Questions ( FAQ )  

 

Tan Delta Test Kit

What is Tan Delta Kit, Tan Delta Test | Loss Angle Test | Dissipation Factor Test


An insulator when is connected across line and earth, it behaves as a capacitor with some effect of resistance because of impurities . Tan delta is ratio of Resistive Current ( Ir ) W.R.T Capacitive Current ( Ic )




Is KPM-TD12 ,difficult to operate ?


​​​​​​KPM TD 12 is a powerful tan delta kit with easiest operation . For any clarifications please feel free to contact our Technical Consultant on consultant@kpmtek.com




Which equipment can be tested using Tan delta Test Kit - KPM TD12 .


KPM TD 12 is capable of testing Power Transformers ( LV , HV & EHV ), CT , PT , Grading Capacitor etc. KPM TD12 can also be upgraded for testing Oil Tan Delta & Generator Tan Delta Testing .




Why we need a separate arrangement/accessories to perform Tan Delta Testing of Generators .


The capacitance of few generators are very high , hence their leakage current is out of reach of the internal power sources of tan delta kits. To conduct tan delta testing of generators different manufacturers have different methods such as resonating inductor or external power sources etc.




How can we test Oil Tan Delta using KPM TD 12 Tan delta Test Kit ?


We can connect an oil test cell to KPM TD 12 which heats the oil sample and conduct the tan delta testing as per international standards .




Is KPM TD12 a bulky equipment with huge dimensions and weight?


KPM TD12 is of only 28KG with smallest dimensions in comparison to peers ie. 350mm(L)×270mm(W)×270mm(H) Portability makes it one of the most preferred equipment to travel with , highly preferred by customers with movement . KPM TD 12 when mounted on JUMBO TRUCK is very easy to move even in uneven ground conditions of substation with all arrangements of Tools , HV and LV Cable Drums & Connectors .




I am having doubt in connections of KPM TD12 , Whom To Contact ?


Connections are very critical during Tan delta Testing . The idea is to understand the path of leakage current flowing from HV conductor to LV Conductor via insulation . During any confusion feel free to contact our Technical consultant on consultant@kpmtek.com




Does KPM-TD 12 Tan delta kit always comes with a Jumbo Truck Trolley?


Jumbo Truck is optional , User can purchase KPM TD 12 without Jumbo Truck also . In That case Customer wil get a KPM TD12 unit with a soft carry bag with all Cable & Accessories .




What is the use of Jumbo Truck Trolley .


KPM TD 12 when mounted on JUMBO TRUCK is very easy to move even in uneven ground conditions of substation with all arrangements of Tools , HV and LV Cable Drums & Connectors . Jumbo Truck can be folded to 50% of its size , making it an ideal trolley for travel also . Jumbo Truck can be customised for any KPM Product .




How to perform Calibration of KPM TD 12


Calibration of KPM TD12 can be done using Calibration Capacitor Model , KPM SC-100pF , a 10KV , 100pF Standard Capacitor





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