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A320 SKV > Electrical System > Flashcards

Electrical System Flashcards

1
Q

In descending order, the priority for electrical power is

A

Onside engine generator, external power, APU, remaining engine generator

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2
Q

According to the graphic, what she powering the airplane

A

Engine driven generators (from the synoptic page)

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3
Q

What is a characteristic of the APU electrical system?

A

Can power the entire plane on the ground

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4
Q

What is a characteristic of the electrical system

A

System operation is normally automatic

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5
Q

The bus tie contractors open or close automatically to maintain power supply to AC busses 1 and 2 when the bus tie switch is in the _____ position

A

Auto (lights out)

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6
Q

While the APU is running and external power plugged in, what is the indication that the APU generator is powering the AC tie bus?

A

EXT PWR AVAIL light illuminated

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7
Q

EXT PWR AVAIL light indicates external power is

A

Plugged in and electrical parameters are normal

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8
Q

Following pushback, what is the configuration of the electrical system when engine 1 is running and the APU is operating

A

GEN 1 powers AC bus 1 and the APU generator powers AC bus 2

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9
Q

Do not hold the IDG disconnect switch for more than _____ to prevent possible damage to the disconnect mechanism

A

3 seconds

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10
Q

In the event of a single IDG failure, the remaining IDG powers

A

The entire electrical system, except for the main galley bus

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11
Q

Do not disconnect the IDG when the

A

Engine is not running or not windmilling

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12
Q

If the IDG 1 switch is pushed in-flight

A

IDG 1 can only be reconnected on the ground by maintenance

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13
Q

What occurs when an IDG is disconnected

A

The corresponding generator can no longer supply power

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14
Q

GALY & CAB FAULT light indicates

A

A generator load exceeds 100% of rated output

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15
Q

A GEN FAULT light indicates

A

The line contactor is open without selecting the respective GEN switch OFF

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16
Q

In flight, with only one-engine generator operating, how is the electrical system configured

A

The main galley power supply is automatically shed

17
Q

In the event of a single TR failure, how is the DC system affected?

A

DC busses 1 and 2 will interconnect through the DC BAT bus. ESS TR powers the DC ESS bus

18
Q

With the loss of TR 1, what pilot action is required

A

No action required: system automatically powers DC bus 1 with TR 2

19
Q

Which bus normally powers the AC ESS bus

A

AC bus 1

20
Q

AC ESS FEED FAULT light

A

Illuminates amber when AC ESS bus is not electrically powered

21
Q

In case of AC bus 1 failure, the AC ESS bus can be transferred to AC bus 2 by

A

Doing nothing, system switching is automatic

22
Q

AC and DC ESS SHED busses

A

Are shed when aircraft is on battery power only

23
Q

What is a characteristic of the battery power system

A

An automatic cutoff logic prevents the batteries from becoming completely discharged on the ground

24
Q

When flying on battery power only, what is the approximate battery endurance

A

22 minutes

25
Q

A battery with low voltage can be charged by

A

Switching external power to ON and ensuring the affected BAT switch is ON

26
Q

How are batteries charged

A

Automatically when DC power is supplied to the DC BAT bus and the BAT switches are ON

27
Q

According to the graphic the batteries are

A

Being Charged (from the graphic on the slide)

28
Q

BAT FAULT light indicates

A

Charging current is outside normal limits

29
Q

The Emergency Electrical Configuration

A

Is the result of loss of AC busses 1 and 2 above 100 knots

30
Q

In the Emergency Electrical Configuration, which Electronic Instrument System (EIS) displays are powered

A

PFD 1, ND 1, and upper ECAM

31
Q

Pushing the MAN ON switch extends the RAT

A

Anytime since it is always powered

32
Q

On earlier A320s, the emergency generator operates only with

A

The landing gear retracted

33
Q

On later A320s and all 319s, the emergency generator operates

A

Until touchdown, regardless of landing gear position

34
Q

If the main gear is retracted in the emergency electrical configuration, the MAN ON switch must be pushed to regain the emergency generator on which airplanes

A

Earlier 320s

35
Q

How is fuel fed to the engines in the emergency electrical configuration

A

No pumps operate, the engines are gravity fed

36
Q

What is a characteristic of the ECAM monitored circuit breakers

A

Cause an ECAM “C/B TRIPPED” caution to appear if tripped or pulled for more than one minute

A320 SKV (18 decks)

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