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CRJ900 Limitations, Systems > Electrical > Flashcards

Flashcards in Electrical Deck (23):
1

Max rating on the TRUs

120 amps

2

What is the relationship between the ADG and hydraulic 3B pump

It has a direct linkage from the pump to the ADG bus

3

Where are the circuit breakers located

Behind the pilot and copilot
Panel 3 in the aft equipment bay

4

Where do you connect the EXT AC PWR

Right side nose

5

What's the bus priority for AC Bus 1/2

Onside IDG
Inside (APU gen)
X-Side IDG
EXT PWR

6

What indications would you receive following a DC TIE closure

DC Criss Tie CLSD status or
DC ESS TIE CLSD status or
DC MAIN TIE CLSD status

7

How can you restore normal electrical system logic after the ADG has deployed, once you restore generator power

Press the ADG PWR TXFR OVERIDE

8

What AC buses power which hydraulic ACMPs

1B and 3A = AC bus 2
3B and 2B = AC bus 1

9

What is the effect of turning off the battery master switch in flight

Some caution messages but ultimately nothing unless AC buses fail completely

10

What is the output voltage of the APU battery and how many amp hours
PSM 07-30-1

24 Vdc and 43 amp-hours

11

The main battery provides power to which bus
PSM 07-30-1

Main battery direct bus

12

Is the DC service bus powered by a hot bus
PSM 07-30-1

No

13

What is the CSD

Constant Speed Drive
It regulates constant generator RPM with variable power settings

14

What does the utility bus power

Right side cabin reading lights

15

If both ESS TRUs fail then which ties close or open

Cross tie closes to power ESS and battery bus
Main tie closes to take over power of bus 2
Utility bus opens

16

What happens if TRU 1 and 2 fail

Transfer line between ESS TRU 2 and 1 which is only displayed on EICAS with failures

17

How many amp hours for the main and APU batteries

17 main
43 APU

18

How do you confirm that the ADG has deployed

ECS electrical page EMER POWER ONLY warning

19

What DC ties are automatic

All

20

What does The ADG power

AC essential bus
3B
ADG bus

21

What does AC ESS XFER mean

Powered by bus 2 when it is usually powered by bus 1

22

Are any of the DC cross ties manually actuated

No

23

What will happen if you stow the manual ADG handle

Nothing. Only the power transfer override switch will restore normal power