RELAY TEST KIT - ( K3063i )
High Power Rating & High Current Rating
Ideal for testing of High Buden Electro-mechanical Relays
Light Weight & State Of Art Design (17KG Only)
State of Art Software (With all advance features) for testing Numerical Relays
Hardware Features of Universal Relay Test Kit (K3063i):
Four independent AC voltage sources of 0- 300V @ 110VA each.
Six independent current sources of 0- 32A @ 450 VA each .
One independent Auxiliary DC Source of 0 ~ 300V/0.6A .
High accuracy analog outputs of <0.15%rd + 0.05%rg,Guar.
Suitable for testing of Numerical as well as electro-mechanical relays
Software Features of Universal Relay Test Kit (K3063i):
Highly advance software with specialized modules for testing of Distance , Differential ,Over Current, Autoreclose , Synchoniser ,Power Swing ,df/dt functions etc.
Graphical test modules and templates with editing function.
Point & Click testing
Shot,Search & Check Test Option
RIO/XRIO import and export facility
GPS sync end-to-end testing
Energy Meter Testing , Transducer calibration, V/I Measurement and Transient Recorder (Optional).
Theory Of Relay Test Kit
Protective relay is a device which maintains the power system equipments and gives an output under an abnormal condition to ensure protection of the system. The basic objective of the protective relay is to isolate the faulty section in a power system as quickly as possible so that rest of the system functions normally. It is necessary to ascertain security, reliability, quality, sensitivity and speed of relays.
Various tests are recommended in National and International Standards to check the withstand capacity of a relay during fault conditions. During testing, protective relay is made to undergo simulated field conditions to check its performance. The relevant National / International standards recommend many tests to ascertain the relays effectiveness to perform its intended function.
The relaying equipment is aided in this task by instrument transformers that sense power conditions and circuit breakers that are capable of disconnecting the faulty element when called upon by the relaying equipment.
Due to their critical role in the power system, protective relays should be acceptance tested prior to being placed in service and periodically thereafter to ensure reliable performance. In a normal industrial application, periodic testing should be done at least every 2 years in accordance with IEC/IS Standard .
Relay Testing Kit – Theory
Relay is a switching device, which issues a trip command to the Circuit Breaker during abnormal fault conditions. A Relay receives the input signals from CT’s/ PT’s and its program calculates the fault conditions as per application. It issues a trip command to the Circuit Breaker on sensing a faulty condition.
Relay Testing Kit injects fault in form of I & V on respective CT & PT points of Relay under test . The Timer of Relay Testing Kit starts by initiating fault injection.
Relay senses the fault & issues the trip command, its trip timing must depend on the time characteristics of relay settings.
Relay Testing Kit receives the trip command from Relay & Stops the timer.
The measured tripping characteristics are compared with respect to expected tripping as per settings by Engineer.
Electromechanical Relay Testing
The secondary of current transformer is connected to the current coil of relay. The secondary of voltage transformer is connected to the voltage coil of the relay. Whenever any fault occurs in the feeder circuit, proportionate secondary current of the CT will flow through the current coil of the relay due to which mmf of that coil increases. This increased mmf is sufficient to mechanically close the normally open contact of the relay. This relay contact actually closes and completes the DC trip coil circuit and hence the trip coil is energized. The mmf of the trip coil initiates the mechanical movement of the tripping mechanism of the circuit breaker and ultimately the circuit breaker is tripped to isolate the fault.