Electrical Panel Flashcards

1
Q

When performing the PRELIMINARY FLIGHT DECK PREPARATION, what is the minimum battery voltage?

A

25.5

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2
Q

What do you do if it is below 25.5V?

A

Select BATT push buttons to ON with EXT PWR on aircraft. This starts the charging cycle (roughly 20 min required)

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3
Q

When performing the FLIGHT DECK PREPARATION, what are we looking for on the ELEC panel BAT check?

A

EMAM ELEC page - select
BAT 1& 2 - OFF then ON
Check BATT current is <60 amps after 10 seconds and continues to decrease

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4
Q

Will the batteries completely drain if you leave the BAT switches in AUTO after AC power is removed on the ground?

A

No. Battery cut - off logic prevents complete discharge when the aircraft is on the ground and unpowered - 22VDC

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5
Q

How is the BATTERY BUS normally powered?

A

DC BUS 1 through a DC tie contactor

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6
Q

What does the amber FAULT light in the GALLEY pushbutton indicate?

A

At least 1 generator load is above 100% rated output

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7
Q

How does the GALLEY pushbutton work in AUTO?

A

Sheds main galley, IFE and in seat power supply if:
Only 1 generator (APU or Engine) is available in FLIGHT, or
Only 1 ENGINE generator is available on the GROUND

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8
Q

What does a FAULT on the ENG GEN pushbutton indicate?

A

The generator line contactor is open because of a fault detected by the Generator Control Unit (GCU) which could include:
Overload
Over/Under voltage
Differential fault (short), and/or
The generator line contactor is open

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9
Q

What does the APU GEN FAULT light indicate?

A

The generator line contactor is open because of a fault detected by the GCU

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10
Q

When is the APU GEN FAULT light inhibited?

A

APU speed to low
Line contactor OPEN after EXT PWR or ENG GEN takes over

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11
Q

What is the function of the BUS TIE in the AUTO position?

A

Allows the BUS TIE CONTACTORS to open and close automatically to maintain power to both AC BUS 1 &n 2:
Allows a single source to power the entire system
Allows connection of the APU GEN or EXT PWR to the system
Inhibits multiple sources to connect simultaneously

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12
Q

What does an IDG FAULT light indicate?

A

Oil pressure low (inhibited when N2 <14%)
Oil outlet temperature overheat
Light is inhibited when IDG is disconnected

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13
Q

What precautions must you take when disconnecting an IDG?

A

Do not disconnect when the engine is not operating or windmilling
Do not hold the disconnect button longer than 3 seconds

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14
Q

How can an IDG be reset?

A

On the ground by maintenance

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15
Q

What is the function of the AC ESS FEED pushbutton in the normal position?

A

Allows AC BUS 1 to power the AC ESS BUS

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16
Q

How is AC ESS FEED transferred from AC BUS 1 to AC BUS 2?

A

Manually by selecting ALTN on the AC ESS FEED pushbutton or automatically if AC BUS 1 is lost and the switch is in the normal position

17
Q

What does the AC ESS FEED pushbutton white ALTN light indicate?

A

AC BUS 2 is powering the AC ESS BUS

18
Q

What is the purpose of the static inverter?

A

To provide AC power to the AC ESS bus from the battery when the EMG GEN is not online when in the Emergency Electrical Configuration

19
Q

What are the 3 times the batteries are connected to the BATTERY BUS?

A

APU start
Battery charging
AC BUS 1 & 2 not powered and airspeed below 100 knots

20
Q

What is the priority sequence for electrical power?

A

(GEARB)
Generators - Engine
EXT PWR (manually selected)
APU Generator
RAT Emergency Generator
Batteries

21
Q

With the APU green AVAIL light ON and the EXT PWR blue ON light illuminated, which system is powering the aircraft?

A

EXT PWR

22
Q

What is the significance of the green and red collared circuit breakers on the flight deck?

A

Green - Monitored by ECAM
Red - Wing tip brake C/B
Black - Not monitored by ECAM