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A320 > Electrical > Flashcards

Electrical Flashcards

1
Q

In descending order, the priority for electrical power is

A

onside gen, external power, APU, remaining engine gen

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2
Q

What is a characterict of the APU electrical system

A

Can power the entire airplane on the ground

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3
Q

what is a characteristic of the electrical system

A

system operation is normaly automatic

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4
Q

The bus tie contactors 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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5
Q

With the APU 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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6
Q

EXT PWR AVAIL light indicates external power is

A

plugged in and electrical parameters are normal

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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 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 sec

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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 TR failure, how is the DC system reconfigured?

A

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

18
Q

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

A

no action, is atuomatically, powers DC bus 1 with TR 2

19
Q

In the normal configuration, which bus feeds 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

What bus provides an alternate source of power for the AC ESS bus?

A

AC bus 2

22
Q

to power the AC essential bus from AC bus 2 due to a loss of AC bus 1 what pilot action is required

A

no action, syst is automatic

23
Q

what occurs with the AC and DC ESS SHED busses when the airplane is on battery power only

A

both busses are shed

24
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

25
Q

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

A

22 minutes

26
Q

how are the batteries charged?

A

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

27
Q

BAT FAULT light indicates

A

charging current is outside normal limits

28
Q

what will cause the aircraft to revert to the emergency electrical configuration?

A

Loss of AC busses 1 and 2 above 100 knts

29
Q

in the emergency electrical configuration, which electronic instruments systems (EIS) displays are powered

A

PFD1, ND1, upper ECAM

30
Q

pushing the MAN ON switch extends the RAT

A

Anytime since it is always powered

31
Q

earlier 320, the emergency generator operates only with

A

the landing gear retracted

32
Q

earlier 320, the emergency generator operates

A

until touchdown (greater than 125 knots) regardless of landing gear position

33
Q

If the gear is retracted in the emergency electrical configuration, the EMERG ELEC PWR MAN ON switch must be pushed to regain the emergency generator on which aiplanes?

A

Earlier 320s

34
Q

how is fuel fed to the engines in the emergency electrical configuration?

A

no pumps operate, the engines are gravity fed

35
Q

what is a characteritic 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

36
Q
A

A320 (11 decks)

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