Electric Power

Question 1

Reset of Circuit Breakers

Answer 1

A circuit breaker may NOT be reset MORE THAN ONCE !!!

Question 2

AC Generators

Voltage

Answer 2

115 VAC

Question 3

AC Generators

Frequency

Answer 3

400 Hz

Question 4

IDG RPM

Answer 4

12.000 RPM

Question 5

AUTO disc at which condition ?

Answer 5

OVERTEMP & OVERTORQUE condition

Only reengaged manually on the ground (after engine shutdown)

Question 6

AC System Load Limitations (kVA)

Altitude ?

Main Gen (each) ?

APU Gen ?

Answer 6

0 - 41.000 ft

40 KVA (each)

40 KVA

Question 7

GEN OVLD MSG

above what Voltage?

Answer 7

> 40 KVA

Question 8

DC System Voltage

Answer 8

28 V DC

Question 9

Min Volts for APU Battery Start

Answer 9

22 V DC

Question 10

Min Volts for Engine Start

Answer 10

24 V DC

Question 11

Ground DC power only limit (min) ?

Answer 11

5 Min

Question 12

TRU load limit

Answer 12

120 A

Question 13

Main Battery Voltage / Capacity

Answer 13

24 V DC / 17 Ah

Question 14

APU Battery Voltage / Capacity

Answer 14

24 V DC / 43 Ah

Question 15

Main & APU Batt. Voltage normal

range

Answer 15

18 - 32 V DC

Question 16

Loss of all AC power / Battery
Power Only

—> Electrical Power may be lost after (min)?

—> Each APU start attempt costs how many
minutes of battery life?

• —> For loss of further A/C systems see QRH

Answer 16

30 mins

6 mins

Question 17

MAIN BATT charger supplied by ?

Answer 17

AC BUS 1

Question 18

APU BATT Charger supplied by?

Answer 18

AC SERVICE BUS

Question 19

Which BUSSES require a landing at the nearest suitable airport ?

*(QRH recommendation)

Answer 19

DC EMER BUS

BATTERY BUS

DC ESS BUS