DGVCL Exam Paper (11-12-2011)
Under operating conditions, the secondary of a current transformer is always short ciruited because

It protects the primary ciruits
It protects the secondary ciruits
It avoids core saturation and high voltage induction
It is safe to human beings

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DGVCL Exam Paper (11-12-2011)
Which of the following correctly represents the sequence of operations of isolator, circiut breaker and earthing switch while opening a circuit?

Open isolator close circuit breaker-open earthing switch
Close earthing switch - open ciruit- breaker-open islotor
Close circuit breaker-close isolator - open earthing switch
Open circuit breaker-open isolator-close earthing switch

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