Electrical

Question 1

100 - The STANDBY PWR OFF (amber) light when illuminated, indicates one or more of the following busses are unpowered: _______ or _______ or _______

Answer 1

AC Standby Bus or DC Standby Bus or Battery Bus

Question 2

200 - 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

300 - when will the Generator DRIVE (amber) light illuminate?

Answer 3

when there is an IDG failure/engine shutdown/IDG disconnected by activation of the DISCONNECT switch/IDG auto-decouple due to high oil temperature (182C).

Question 4

400 - 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

500 - what does the BUS TRANSFER switch, in the AUTO (guarded) position, allow?

Answer 5

Allows the Bus Tie Breakers (BTB) to operate automatically to maintain power to the AC transfer busses from any operating generator or external power.