700/900 Electrical Flashcards Preview

SkyWest CRJ Upgrade 2019 > 700/900 Electrical > Flashcards

Flashcards in 700/900 Electrical Deck (19):
1

What is an ACPC and what does it control?

AC Power Center
Controls AC power distribution, bus logic, and auto transfers

2

What is the normal Generator switch position in the 700/900?

Auto

3

What are the AC busses in the 700/900?

BUS 1
BUS 2
ESS BUS
SERV BUS

4

How many AC utility busses are on the 700/900?

None" no load shedding

5

How many kVAs are the 700/900 IDGs? APU Gen?

40 kVA

6

Do the generators have any altitude restrictions?

No altitude restrictions, 40 kVA regardless of altitude

7

Can 1 generator support the entire AC load on the 700/900?

YES; no load shedding, no AC utility busses necessary

8

What does the ADG supply power to in the 700/900?

Slats and flaps
ACMP 3 B
Stab trim channel 2

9

How many TRUs do the 700/900 have? how many amps?

4 TRUs at 120 amps

10

How many DC busses are on the 7/9? What are they?

9 busses
BUS 1 UTIL BUS ESS BUS
BUS 2 SERV BUS BATT BUS
APU BATT DIR BUS MAIN BATT DIR BUS
EMER BUS

11

How many DCPCs on the 7/9? What is their purpose?

2 separate units
Controls DC power distribution
Auto switch between DC sources
Includes many of the circuit breakers that were removed

12

oHow many DC tie contractors? What are they?

5
MAIN TIE ESS TIE CROSS TIE DC ESS TRU 2 TRSFR SERVICE BUS contractor

13

What tie opens when on ADG power and TRU 1 fails?

ESS TRU 2 transfer contractor opens

14

TRU 1 and AC BUS 2 Fails?

ESS TRU 2 Transfer Contractor opens

15

Where is the MAIN BATT?

in the unpressurized nose cone

16

Where is the APU BATT?

in the aft equipment bay

17

What are the HOT BUSSES?

APU BATT DIR BUS
MAIN BATT DIR BUS
DC EMER BUS

18

What does the DC Service BUS power? How is it powered?

NAV lights, cabin lighting for cleaners, and general cabin power
powered by: APU BATT DIR BUS/ DC BUS 2

19

Where Circuit Breaker panel 1 located? Panel 2?

Behind Captain
Behind FO