Electrical System

Question 1

Electrical Sources

Answer 1

. Eng Gen
. APU
. Battery
. Power Cart

Question 2

What DC Busses are Essential Vs Main

Answer 2

1 and 3 = Essential Busses

2 and 4 = Main Busses

Question 3

Bat: ____v _____AH

Answer 3

. 24vdc 35AH
. Separate Avionics and utility Batteries
. May be charged if 22-24vdc
. provide 30 minutes of emergency power

Question 4

Transformer Rectifier

Answer 4

28vdc

Question 5

If APU is online, it always powers the _______ bus irrespective of other Gens. If only the APU is online it will power both _______ and ________ busses.

Answer 5

Essential AC bus, Essential and Main AC

Question 6

Rule for Generator power table

Answer 6

Wing takes care of wing, then symmetrical.

Question 7

Generator Power rating

Answer 7

40/50 kVA, 115v, 400Hz, 3 phase

Question 8

Standby instruments powered by

Answer 8

Utility battery bus

Question 9

Inverter power rating

Answer 9

. Main Avionics - 115Vac and 26Vac

. Essential Avionics - 115Vac

Question 10

External Power Requirements

Answer 10

200/115V, 3-phase, 400-Hz, 40/50 kVA; phase rotation A-B-C

Question 11

Utility bat Powers?

Answer 11

Utility bat bus, Isolated Bus

Question 12

Avionics bat powers?

Answer 12

Avionics bat bus, Avionics DC bus