Electrical Flashcards
(18 cards)
Location of the APU battery?
Aft equipment bay
Location of Main battery?
Nose compartment
Max engine generator load?
40 KVA
Max APU generator load?
40 KVA
Max TRU load?
120 amps
Max permissible time for ground operations with battery power only?
5 minutes
What is the reason for battery power limitations?
To prevent ED1 and ED2 from overheating (fans are AC powered)
How many TRU’s are installed in the CRJ900?
4
Where are the TRU’s located?
Nose compartment
The Main battery is rated to?
24 volts/17 amp hour
The APU battery is rated at?
23 volts/43 amp hour
How many generators are installed?
4,
2 IDG (engines)
APU
ADG
What is the function of the 4 TRU’s?
To convert 115VAC to 28VDC
How are the TRU’s cooled?
Individual fans
Which buses are powered when the Battery Master switch is selected on?
Main battery direct bus
APU battery direct bus
DC battery bus
If the main buses are powered, are the essential buses automatically
Powered?
Yes
Is there an on/off switch for the TRU’s?
No, they are automatically powered when the AC busses are powere
What controls the DC tie contactors?
The DC Power Centers (DCPC) automatically control DC tie operation?
