Answer / seshu

In the protection philosophy our aim is to protect the system under abnormal conditions for which we require tripping of the circuit breaker. So that every circuit breaker having 2 nos Trip coils (for redundancy).Once the breaker closed it has to trip so the monitoring of Trip coil supervision is necessary .In general closing coil supervision is not necessary and it would be additional cost

how to can we synchronize different capacity of DG sets.60kva& 250kva?

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how the earhing is done on ship and airplane.

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2 Answers  

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