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Emergency Power Supply Systems Quiz

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Questions and Answers

Which diesel generator set will start when the voltages at the emergency bus bars drop below 0.7VN?

00XKA01

00XKA02

Neither generator set will start

Both generator sets will start (correct)

Which voltage transformers are used to sense undervoltages at the emergency bus bars?

00XKA01 and 00XKA02

00BBC and 00BBD (correct)

00XKA01 and 00BBC

00BBD and 00XKA02

What is the method of control for the pre-selected diesel generator set?

Programmable logic controller (PLC) (correct)

Neutral grounding switch (NGS)

Emergency bus bars

Automatic changeover switch

What happens if one of the diesel generator sets fails to start?

The pre-selection automatically changes to the other generator set Signup and view all the answers

When will the second diesel generator set shutdown automatically after starting?

If it fails to synchronize within 3 minutes Signup and view all the answers

What is the minimum voltage level at which the diesel generator sets will start?

0.7VN Signup and view all the answers

How are the diesel generator sets connected to the 6.6kV busbar?

Through their diesel generator circuit breaker Signup and view all the answers

What will happen if the second BSDG fails to start?

The other DG will be connected to the 6.6kV busbar Signup and view all the answers

When will the second BSDG shutdown automatically if not synchronized?

Within 3 minutes after start Signup and view all the answers

What is the condition for considering the Emergency Power Supply to be in operation?

Voltage >min for more than 5 seconds Signup and view all the answers