Answer / k.prakashchandra

As its name implies,on tripping it automatically re-closes
after a certain time interval ,even 2-3 times as desired.If
the fault persists ,it will send an SMS to the concerned.

Why we use duplex coil and hook switch in telephone system?

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Why using synchronising methed in DG's sets?

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no of rotrs poles in salient pole synchronous machine

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Do you know how to measure the earth resistance?

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