Answer / prasun bhaumik

First put normal PT supply and then increase the current up
to the pick up level and then upto 2 times of it then see
the time of operation.


Then keep the current at plug setting value , now decrease
the voltage gradually to see the minimum restraining
voltage at which the relay will start to operate

Answer / shivani

can u tell me which paricular relay u are asking.
Generally all relay tested on two theory.
1.pick up value test
2.Pick up time test.

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