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Electrical Flashcards

1
Q

The primary challenger electrical system is?

A

115 volt AC

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2
Q

A constant generator speed is ensured by the?

A

CSD

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3
Q

The number of AC generators is?

A

Four
1. L Engine Gen
2. R Engine Gen
3. APU Gen
4. ADG

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4
Q

Emergency in-flight AC power is provided by?

A

ADG

Air Deployable Generator

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5
Q

The CSD oil quantity is checked by?

A

Viewing a sight glass

CSD: Constant Speed Drive

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6
Q

On the ground, AC power can be supplied by:

A
  1. APU Generator
  2. AC Ground Power Unit
  3. Engine Genertors (when running)
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7
Q

If the ADG is inadvertently deployed, it can be retracted?

A

Only on the ground

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8
Q

If the GEN 1/2 OVLD CAS message illuminates:

A

Generator load has exceeded 34.5kva

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9
Q

Primary DC power is supplied by:

A

4 each TRUs
2 each Batteries
GPU

Transformer Rectifier Units

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10
Q

What is the voltage of the AC electrical system?

A

115 volt

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11
Q

What is the voltage of the DC electrical system?

A

28 volt

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12
Q

What supplies the primary source of AC electrical power?

A

Engine-Driven Integrated Drive Generators (IDG’s)

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13
Q

What is the normal rating of each Engine driven generator?

A

30 kilovolt-amperes to 35,000ft (25kva to 41,000ft)

30kva APU Gen

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14
Q

The engine generator is tripped off and removed from the AC buses when?

A

Over/ under voltage
Over/ under frequency
Generator and bus over current

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15
Q

What is the rating of the APU generator?

A

30kva from sea level up to the APU’s maximum operating altitude of 20,000ft

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16
Q

The aircraft AC bus system consists of how many buses?

A

FIVE
1. AC BUS 1
2. AC BUS 2
3. AC ESS BUS
4. AC UTIL BUS 1
5. AC UTIL BUS 2

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17
Q

The bus priority logic for AC BUS 1 and AC BUS 2 is?

A

On side engine driven generator
APU Generator
Cross side engine driven generator
External AC Power

GAGE

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18
Q

The flight crew can manually inhibit the automatic bus transfer priority logic by pressing what?

A

AUTOXFER (eg. electrical smoke or fire)

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19
Q

The ADG provides power to what?

A

AC ESS BUS and 3B hydraulic pump

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20
Q

How much power does the ADG provide?

A

115 volt, 400hz, 15kva

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21
Q

Automatic deployment of the ADG occurs when?

A

Both AC BUS 1 and AC BUS 2 become unpowered and the aircraft is in flight (WOW).

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22
Q

The DC electrical system is made up of what?

A

4 x TRU’s
2 x Nicad batteries
An external DC power receptacle

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23
Q

How many buses does the DC Electrical system consist of?

A

Nine
1. DC BUS 1
2. DC BUS 2
3. DC ESS BUS
4. DC EMER BUS
5. BATT BUS
6. DC UTIL BUS 1
7. DC UTIL BUS 2
8. Main battery direct bus
9. APU Battery direct bus

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24
Q

Each TRU is rated at?

A

100amps

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25
Q

The four TRU’s are identified as:

A
  1. TRU 1
  2. TRU 2
  3. ESS TRU 1
  4. ESS TRU 2
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26
Q

TRU 1 supplies what?

A

DC Bus 1 and DC UTIL BUS 1

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27
Q

TRU 2 supples what?

A

DC Bus 2 and DC UTIL BUS 2

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28
Q

ESS TRU 1 supplies what?

A

DC ESS BUS and DC BATT BUS

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29
Q

ESS TRU 2 supplies what?

A

DC ESS BUS and DC BATT BUS

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30
Q

If either TRU fails, both buses can be supplied by either TRU by selecting what?

A

MAIN BUS TIE switch/ light

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31
Q

If both ESS TRU’s fail in flight, what will power the DC ESS BUS?

A

APU BATT DIR BUS through the solid state contactor

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32
Q

The main battery is what voltage/amperage?

A

24 volt, 17 amp hour

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33
Q

The APU battery is what voltage/ amperage?

A

24 volt, 43 amp hour

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34
Q

How many circuit breaker panels are there?

35
Q

CBP 1 controls?

Circuit Breaker Panel

A

AC BUS 1
BC BUS 1
BATT BUS
CBP 1 LOWER = EMERGENCY

36
Q

CBP 3 contains what?

Circuit Breaker Panel

A

AC ESS BUS

37
Q

IDG’s provide what output?

A

115v, 400hz, 3 phase

38
Q

Engine generators are rated to what altitude?

A

30kva to 35,000, 25kva to 41,000

39
Q

APU altitude rating?

A

30kva to 20,000ft

40
Q

The generator trips when?

A
  • Over/ under voltage
  • Over/ under frequency
  • Generator and bus overcurrent
41
Q

Bus priority logic?

A

Onside IDG
APU
Cross side IDG
External power

GAGE

42
Q

ADG provides what power output?

A

115 volt, 400hz, 15kva

43
Q

The ADG powers what?

A

AC ESS BUS and 3B hydraulic pump

44
Q

Each TRU provides?

45
Q

Main battery?

A

24volt, 17amp/hr

46
Q

APU battery?

A

24 volt, 43amp/hr

47
Q

DC system is capable of charging batteries between what percentages?

48
Q

Ignition A is powered by

A

AC ESS BUS

49
Q

Ignition B is powered by

A

DC BATT BUS

50
Q

START is powered by

A

DC BATT BUS

51
Q

Thrust reverser powered by

A

DC ESS BUS

Switching – actuation is bleed air

52
Q

L Oil pressure powered by

A

DC BATT BUS

53
Q

R Oil pressure powered by

A

DC ESS BUS

54
Q

PIlot’s PFD/MFD powered by

A

DC ESS BUS

55
Q

Copilots PFD/MFD powered by

56
Q

ADC 1 powered by

A

DC ESS BUS

57
Q

ADC 2 powered by

58
Q

IRS 1 powered by

A

DC BATT BUS AND AC ESS BUS

59
Q

IRS 2 powered by

A

DC ESS BUS AND AC BUS 2

60
Q

ATC 1 is powered by

A

DC ESS BUS

61
Q

ATC 2 is powered by

62
Q

FMS 1 powered by

63
Q

FMS 2 powered by

64
Q

GPS 1 powered by

65
Q

GPS 2 powered by

66
Q

Weather radar powered by

67
Q

TCAS powered by

A

AC ESS BUS

68
Q

CB reset philosophy?

A

Only reset if directed by QRH (AFM).

69
Q

After BATT MASTER is turned ON, why is the ESS POWER white ALTN light on?

A

No AC power to bus 1; looking to Bus 2 for power

70
Q

What buses are powered after the battery switch has been turned on?

A
  • BATT BUS
  • EMER BUS
  • APU BATT DIR BUS
  • MAIN BATT DIR BUS
71
Q

What does an AVAIL light mean on the EXT POWER AC swith light?

A

External AC power is connected and operting within limits.

72
Q

What does a white “IN USE” light indicate on the EXT POWER DC light?

A

External DC power is connected, in use (NO guarantee within limits)

73
Q

When landing with ADG power only, why do we pull the ADG manual release handle?

A

To ensure DC ESS bus remains powered during deceleration.

74
Q

What does ADG lamp test indicate at this time?

A

Lamp is functional and battery is connected

75
Q

When do you do the ADG UNIT test? What should the test look like?

A
  • Both engines running
  • Ground: on after 1 sec, out after 2 secs
  • Flight: on after 2 se, out after 5-7 secs
76
Q

What is load shed on a single generator?

A

AC UTIL BUS 1 & 2

77
Q

The external DC power receptacle is located…

A

Left side of the airplane below the engine

78
Q

The GEN 2 OFF CAS message comes on; what action is required?

A

Call for the GEN 2 OFF checklist

79
Q

GCU?
GLC?
GTC?

A

Generator Control Unit
Generator Line Contactor Unit
Generator Transfer Contactor Unit

80
Q

What does a GCU do?

A

Monitors, Regulates and Controls

81
Q

When does the aircraft “auto load shed” in flight? On the Ground?

A
  • Single Gen inflight
  • Single Gen + Flaps on ground

Flaps >4 deg

82
Q

What is on the DC EMER BUS?

A

Fire bottles x3
Fuel SOV
Hyd SOV

83
Q

What BUSes are always hot?

A
  • APU BATT DIR
  • BATT

CL-604 (12 decks)

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