Question

Which of the following correctly presents the sequence of operations of isolator circuit breaker and earthing switch while closing a circuit :

• A. Ensure circuit breaker is closed - close isolator - open earthing switch
• B. Ensure circuit breaker is open - close isolator - open earthing switch if any close circuit breaker
• C. Ensure circuit breaker is open - open isolator - open earthing switch if any close circuit breaker
• D. None of the above

Answer 1

The correct option is B Ensure circuit breaker is open - close isolator - open earthing switch if any close circuit breaker

Ensure circuit breaker is open - close isolator - open earthing switch if any close circuit breaker .

Option B is correct.