Electrical

Question 0

Location of the APU battery?

Answer 0

Aft equipment bay

Question 1

Location of Main battery?

Answer 1

Nose compartment

Question 2

Max engine generator load?

Answer 2

40 KVA

Question 3

Max APU generator load?

Answer 3

40 KVA

Question 4

Max TRU load?

Answer 4

120 amps

Question 5

Max permissible time for ground operations with battery power only?

Answer 5

5 minutes

Question 6

What is the reason for battery power limitations?

Answer 6

To prevent ED1 and ED2 from overheating (fans are AC powered)

Question 7

How many TRU’s are installed in the CRJ900?

Answer 7

4

Question 8

Where are the TRU’s located?

Answer 8

Nose compartment

Question 9

The Main battery is rated to?

Answer 9

24 volts/17 amp hour

Question 10

The APU battery is rated at?

Answer 10

23 volts/43 amp hour

Question 11

How many generators are installed?

Answer 11

4,
2 IDG (engines)
APU
ADG

Question 12

What is the function of the 4 TRU’s?

Answer 12

To convert 115VAC to 28VDC

Question 13

How are the TRU’s cooled?

Answer 13

Individual fans

Question 14

Which buses are powered when the Battery Master switch is selected on?

Answer 14

Main battery direct bus
APU battery direct bus
DC battery bus

Question 15

If the main buses are powered, are the essential buses automatically
Powered?

Answer 15

Yes

Question 16

Is there an on/off switch for the TRU’s?

Answer 16

No, they are automatically powered when the AC busses are powere

Question 17

What controls the DC tie contactors?

Answer 17

The DC Power Centers (DCPC) automatically control DC tie operation?