Flashcards in Electrical Deck (20):
Location of the main battery?
Location of the APU battery?
Aft equipment bay
Max engine generator load?
Max APU generator load?
Max TRU load?
Max permissible time for ground operations with battery power only? Why?
5 minutes. To prevent ED 1 and ED 2 from overheating because the cooling fans are AC powered
How many TRUs are installed?
Where are the TRUs located?
The main battery is rated to?
24V/17 amp hrs
The APU battery is rated to?
24V/ 43 amp hrs
How many generators are installed?
4, 2 engine generators, the APU generator, and the ADG
What is the function of the 4 TRUs?
To convert 115V AC TO 28V DC
How are the TRUs cooled?
Which buses are powered when the battery master switch is selected on?
Main battery direct bus, APU battery direct bus, DC direct bus
If the main buses are powered, are the essential buses automatically powered?
Is there an on/off switch for the TRUs?
No, they are powered automatically when the AC buses are powered
What controls the DC tie contactors?
The DC Power Centers automatically control the DC tie operation
When will the ADG automatically deploy?
With complete loss of aircraft power
With the ADG deployed, what are the basic items that are powered?
AC ESS bus, hydraulic pump 3B, flaps/slats, STAB trim CH 2