Electrical

Question 1

Main Generator ratings

Answer 1

30/45 kVA, 115 volt ac, 3 phase, 400 hz

Question 2

Main driven by___

Answer 2

Accessory modules

Question 3

Lubrication for main gen

Answer 3

transmission oil

Question 4

APU Generator ratings

Answer 4

35 kVA, 115 volt ac, 3 phase, 400 hz

Question 5

Generator control unit functions

Answer 5

Connects each generator to ac bus system
Regulates generator output
Protects against
         overvoltage
         undervoltage
         feeder fault
         underfrequency

Question 6

WOW GCU disconnects main generator from power distribution at____

Answer 6

94% Nr

Question 7

In flight underfrequency protection disabled and generators remain online until _____

Answer 7

80% Nr

Question 8

Minimum Nr for GCU to reconnect generators

Answer 8

97% Nr

Question 9

What can external power provide when its the sole source

Answer 9

Energize the entire system

Question 10

External power circuit breaker and current draw

Answer 10

4 amp circuit breaker

2 amp draw on the cable, some ships require a load to be sensed in order to apply power

Question 11

5 AC buses

Answer 11

#1 AC Primary
#2 AC Primary
AC Essential
AC secondary
AC Monitor

Question 12

What happens to external power when either a main or apu is on

Answer 12

Automatically disconnects

Question 13

No. 1 Generator powers what buses

Answer 13

1 AC primary

AC essential
AC secondary

Question 14

No. 2 Generator powers what buses

Answer 14

#2 AC primary
AC monitor

Question 15

If APU on with both mains on

Answer 15

APU will not be connected to the AC bus distribution

Question 16

Major load on No.1 AC Primary

Answer 16

Backup hyd pump

Question 17

Major load on AC secondary

Answer 17

Mission pwr avionics

Tail rotor deice

Question 18

Major and only load on AC monitor

Answer 18

Main rotor Deice

Question 19

Buses powered with only APU

Answer 19

#1 AC primary
#2 AC primary
AC Essential

Question 20

Only One Gen and APU with bakcup and mission pwr on

Answer 20

AC Monitor will not be powered

Question 21

Only one Gen

Answer 21

AC SEC and AC MON will not be powered

Question 22

Number of converters and power supply

Answer 22

2 converters, 28 Vdc

Question 23

Power to converters from

Answer 23

1/2 AC primary bus

Question 24

Power of battery, composition

Answer 24

24 Vdc

Nickel-cadmium

Question 25

Battery, primary source of power for?

Answer 25

APU start

Question 26

Battery, secondary source for

Answer 26

DC essential and battery bus

Question 27

Battery life with 80% charge

Answer 27

11 minutes day

9 minutes night

Question 28

Normal operations battery powers?

Answer 28

Battery utility bus

Question 29

Battery analyzer/conditioner monitoring powered by?

Answer 29

2 AC primary bus

Question 30

Battery analyzer/conditioner monitors for?

Answer 30

Fault conditions
Battery charge
internal temp
cell conditions

Question 31

Battery analyzer/conditioner charges battery through?

Answer 31

2 DC primary bus

Question 32

1 converter powers

Answer 32

1 DC primary

DC essential
battery bus

Question 33

2 converter powers

Answer 33

2 DC Primary

Question 34

Single converter failure

Answer 34

Other converter picks up load

Question 35

Dual converter failure, battery powers

Answer 35

utility bus
battery bus (if switch on)
DC essential (charge above 35%)

Question 36

Battery below___ and no other source of power may not have sufficient fire bottle CAD

Answer 36

30%