CRJ 200 Electric System

Question 0

Sources of AC Power

Answer 0

2 Engine IDGs
APU GEN
ADG
EXTERNAL

Question 1

What is the voltage of the AC and DC system?

Answer 1

115v AC

28v DC

Question 2

Sources of DC Power

Answer 2

5 TRUs
2 Lead/Acid Batteries
28v External Power

Question 3

Type of power from IDG?

Answer 3

115v, 400hz 3 phase electrical power

Question 4

What does the FAULT light in the IDG switch light indicate?

Answer 4

High Oil Temps
or
Low Oil Pressure

still supplies power

Question 5

What are the ways the IDG can disconnect from the engine gearbox?

Answer 5

1. pressing IDG DISC switch
2. when CSD internal temps raises to a certain temp the IDG will disconnect.
3. over torque condition will cause the shearing of the IDG drive shaft.

Question 6

What monitors the generator system?

Answer 6

GCU

Question 7

Engine generator will automatically go offline and removed from the system when?

Answer 7

1. generator or bus over current
2. Over or Under Frequency
3. Over or Under Voltage

Question 8

AC External Power switch lights up green AVAIL it indicates?

Answer 8

AC ground power is plugged in and has: Proper Voltage, Frequency, Polarity.

Question 9

what are the Volts, HZ, and KVA provided by the ADG?

Answer 9

115v, 400hz, 15 KVA

Question 10

What are the airspeed limitations for the ADG?

Answer 10

DRY - NONE
WET - Max Continuous - 250 KIAS
up to 330 KIAS - 12 min
331-335 - 4 min

Question 11

AC Power Priority

Answer 11

1. Onside GEN
2. APU
3. Other-side GEN
4. External

Question 12

AC UTIL BUS LOAD SHED on Ground

Answer 12

1. Single GEN
2. Flaps >0
3. Main Cabin Door Closed
4. Galley Service Door

Question 13

AC UTIL BUS LOAD SHED in Flight

Answer 13

SINGLE GEN

Question 14

AUTO XFER FAIL

Answer 14

Illuminates for a bus fault or generator over current condition (priority system inhibited).
Associated AC Bus cannot be powered by the APU or the offside generator and cannot be reset in the air.

OFF - press in to disable the priority transfer system. press again to restore normal operation.

Question 15

ADG AUTOMATIC DEPLOYMENT

Answer 15

1. Loss of all AC power
2. Last AC Source INTERNAL
3. WOW
4. Parking Brake - OFF

Question 16

CHARGER STATUS

Answer 16

Charger not Charging

Question 17

ESS TIE

Answer 17

Manual ONLY

DO NOT CLOSE ESS TIE if SERVICE TRU is powering DC BUS1/2.
IRREVERSIBLE

Question 18

AC ESS XFER illuminated when:

Answer 18

the AC ESS BUS is not powered by AC BUS 1.

Press to power the AC ESS BUS from AC BUS 2.

If AC BUS 1 & 2 are not powered the switch illuminates.