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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
The four TRU’s are identified as:
1. TRU 1 2. TRU 2 3. ESS TRU 1 4. ESS TRU 2
26
TRU 1 supplies what?
DC Bus 1 and DC UTIL BUS 1
27
TRU 2 supples what?
DC Bus 2 and DC UTIL BUS 2
28
ESS TRU 1 supplies what?
DC ESS BUS and DC BATT BUS
29
ESS TRU 2 supplies what?
DC ESS BUS and DC BATT BUS
30
If either TRU fails, both buses can be supplied by either TRU by selecting what?
MAIN BUS TIE switch/ light
31
If both ESS TRU’s fail in flight, what will power the DC ESS BUS?
APU BATT DIR BUS through the solid state contactor
32
The main battery is what voltage/amperage?
24 volt, 17 amp hour
33
The APU battery is what voltage/ amperage?
24 volt, 43 amp hour
34
How many circuit breaker panels are there?
5
35
CBP 1 controls? | Circuit Breaker Panel
AC BUS 1 BC BUS 1 BATT BUS CBP 1 LOWER = EMERGENCY
36
CBP 3 contains what? | Circuit Breaker Panel
AC ESS BUS
37
IDG’s provide what output?
115v, 400hz, 3 phase
38
Engine generators are rated to what altitude?
30kva to 35,000, 25kva to 41,000
39
APU altitude rating?
30kva to 20,000ft
40
The generator trips when?
* Over/ under voltage * Over/ under frequency * Generator and bus overcurrent
41
Bus priority logic?
Onside IDG APU Cross side IDG External power | GAGE
42
ADG provides what power output?
115 volt, 400hz, 15kva
43
The ADG powers what?
AC ESS BUS and 3B hydraulic pump
44
Each TRU provides?
100amps
45
Main battery?
24volt, 17amp/hr
46
APU battery?
24 volt, 43amp/hr
47
DC system is capable of charging batteries between what percentages?
30-100%
48
Ignition A is powered by
AC ESS BUS
49
Ignition B is powered by
DC BATT BUS
50
START is powered by
DC BATT BUS
51
Thrust reverser powered by
DC ESS BUS | Switching -- actuation is bleed air
52
L Oil pressure powered by
DC BATT BUS
53
R Oil pressure powered by
DC ESS BUS
54
PIlot’s PFD/MFD powered by
DC ESS BUS
55
Copilots PFD/MFD powered by
DC BUS 2
56
ADC 1 powered by
DC ESS BUS
57
ADC 2 powered by
DC BUS 2
58
IRS 1 powered by
DC BATT BUS AND AC ESS BUS
59
IRS 2 powered by
DC ESS BUS AND AC BUS 2
60
ATC 1 is powered by
DC ESS BUS
61
ATC 2 is powered by
DC BUS 2
62
FMS 1 powered by
DC BUS 1
63
FMS 2 powered by
DC BUS 2
64
GPS 1 powered by
DC BUS 1
65
GPS 2 powered by
DC BUS 2
66
Weather radar powered by
DC BUS 1
67
TCAS powered by
AC ESS BUS
68
CB reset philosophy?
Only reset if directed by QRH (AFM).
69
After BATT MASTER is turned ON, why is the ESS POWER white ALTN light on?
No AC power to bus 1; looking to Bus 2 for power
70
What buses are powered after the battery switch has been turned on?
* BATT BUS * EMER BUS * APU BATT DIR BUS * MAIN BATT DIR BUS
71
What does an **AVAIL** light mean on the EXT POWER AC swith light?
External AC power is connected ***and*** operting within limits.
72
What does a white "**IN USE**" light indicate on the EXT POWER DC light?
External DC power is connected, in use (NO guarantee within limits)
73
When landing with ADG power only, why do we pull the ADG manual release handle?
To ensure DC ESS bus remains powered during deceleration.
74
What does ADG lamp test indicate at this time?
Lamp is functional and battery is connected
75
When do you do the ADG UNIT test? What should the test look like?
* Both engines running * Ground: on after 1 sec, out after 2 secs * Flight: on after 2 se, out after 5-7 secs
76
What is load shed on a single generator?
AC UTIL BUS 1 & 2
77
The external DC power receptacle is located...
Left side of the airplane below the engine
78
The GEN 2 OFF CAS message comes on; what action is required?
Call for the GEN 2 OFF checklist
79
GCU? GLC? GTC?
Generator Control Unit Generator Line Contactor Unit Generator Transfer Contactor Unit
80
What does a GCU do?
Monitors, Regulates and Controls
81
When does the aircraft "auto load shed" in flight? On the Ground?
* Single Gen inflight * Single Gen + Flaps on ground | Flaps >4 deg
82
What is on the DC EMER BUS?
Fire bottles x3 Fuel SOV Hyd SOV
83
What BUSes are always hot?
* APU BATT DIR * BATT

CL-604 (12 decks)

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