Electrical Jeopardy

Question 1

The STANDBY PWR OFF (amber) light when illuminated, indicates one or more of the following buses are unpowered: ____, ____, or ____.

Answer 1

-AC standby Bus
-DC Standby Bus
-Battery Bus

Question 2

When does the BAT DISCHARGE Light (Amber) illuminate?

Answer 2

When excessive battery discharge is detected on the main battery and/or auxiliary battery

Question 3

When will the generator DRIVE (Amber) light illuminate?

Answer 3

-IDG failure
-Engine shutdown
-IDG disconnected by activation of the DISCONNECT switch
-IDG auto-decouple due to high oil temp (182C).

Question 4

How long will two fully charged batteries provide standby power?

Answer 4

Two fully charged batteries have sufficient capacity to provide standby power for a minimum of 60 minutes.

Question 5

What does the BUS TRANSFER switch, in the AUTO (guarded) position, allow?

Answer 5

Allows the bus tiebreakers to operate automatically to maintain power to AC transfer buses from any operating generator or external power.