Question

15 Multiple Choice (Select 1 out of 4 options, for the question below.) 20 An over current relay, having a current setting of 125% connected to a supply circuit through a current transformer of ratio 40015. The pick up value is -5?​

Answer 1

Answer:

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Answer 2

Answer:

6.25 Å

Explanation:

Pick-up current = Rated secondary current of C.T. ×  Current setting

= 5 x 1.25 = 6.25 A

It means that with above current setting, the relay will actually operate for a relay coil current equal to or greater than 6.25 A.