AC Distribution

Question 1

Identify the three Unit 1 Emergency 4.16 KV buses.

Answer 1

1 A3, B3, & AB 4.16 kV Bus

Question 2

List the one 480 V MCC that is supplied using an automatic bus transfer (ABT) switch.

Answer 2

MCC 1C

Question 3

List the two Auto Start Signals that will automatically start an Emergency Diesel Generator.

Answer 3

1. Under voltage on the associated 4.16 KV bus.
   The EDG automatically re-energizes the bus.
2. Safety Injection Actuation Signal (SIAS)
   EDG starts & comes to running speed but does not tie onto the bus.