ELEC Panel Flashcards

1
Q

What is the minimum battery voltage?

A

25.6V

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2
Q

What would a pilot do if BAT voltage is 25.5 or below on originating preflight?

A

Charge the batteries with external power by selecting BAT pushbuttons to AUTO

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3
Q

How long should the batteries be charged?

A

20 minutes, then recheck the voltage

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4
Q

Explain how to conduct the BAT check. What if it fails the test?

A

• Select ELEC on ECAM • TurnBAT1&2OFFthenON • Check BAT charge current is < 60 amps and decreasing within 10 seconds • If it fails the test, wait until the end of the charging cycle, and repeat the test

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5
Q

Describe the electrical power system.

A

• 2x 28V Batteries • 2x IDGs • APU GEN • 2x AC Buses (AC1 and AC2), AC ESS BUS (normally powered by AC BUS 1) • 2x TRUs • Backed-up by a RAT to supply emergency electrical power ————————————– • The electrical power system consists of a three-phase 115/200-volt 400- hertz constant frequency AC system and a 28-volt DC • Normally, the system produces alternating current, some of which is then transformed into direct current for certain applications. • Each of the aircraft’s three generators can supply the whole network. • If all normal AC generation is lost, an emergency generator can supply AC power. • If all AC generation is lost, the system can transform DC power from the batteries into AC power.

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6
Q

If all AC power is lost, what happens?

A

DC power from the batteries is converted into AC.

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7
Q

What would be an expected indication in the GEN pushbuttons prior to engine start?

A

FAULT indication.

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8
Q

Define and describe an IDG.

A

• Integrated Drive Generator • Takes variable engine output and gives a constant output.

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9
Q

How would a pilot disconnect an IDG?

A

Lift the red guard and push the IDG pushbutton, being careful not to hold the pushbutton for longer than three seconds.

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10
Q

How would an IDG be reconnected?

A

This cannot be done by the flight crew – it is a maintenance function.

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11
Q

Describe the function of the BUS TIE in AUTO.

A

• Allows a single source of power to power AC BUS 1 & 2 • Allows connection of the APU GEN or EXT power to system • Inhibits multiple sources connected simultaneously

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12
Q

If GEN 1 fails to supply AC BUS 1, what happens?

A

Gen 2 (or APU GEN if available) powers the system through the bus tie.

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13
Q

How is the AC ESS BUS normally powered?

A

From AC BUS 1

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14
Q

If AC BUS 1 fails, how is the AC ESS bus powered?

A

AC bus 2 automatically feeds the AC ESS bus.

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15
Q

What indication will be present on the ELEC panel that AC BUS 2 is feeding the AC ESS bus?

A
  • There is no indication if the transfer was done automatically.
  • If manually selected, the AC ESS FEED ALTN light will illuminate.
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16
Q

What does a GALLEY fault light indicate?

A

At least one generator load is above 100% rated output.

17
Q

Explain the AUTO function of the GALLEY pushbutton.

A

Sheds main galley if only 1 GEN is available

18
Q

How is the BATTERY BUS normally powered?

A

DC BUS 1 through the DC tie contactor

19
Q

What buses are powered by the EMER GEN?

A

• AC ESS BUS • AC ESS SHED • DC ESS BUS by the ESS TRU • DC ESS SHED

20
Q

What is the difference of the APU GEN FAULT and the ENG GEN FAULT?

A

Nothing. The Fault is the same as the GEN 1 or GEN 2 fault.

21
Q

What does a BAT FAULT light indicate?

A

• Battery charging current outside limits. • BAT contactor opens.

22
Q

When are the batteries connected to the battery bus?

A

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

23
Q

FAULT: What does the APU GEN FAULT light indicate?

A
  • The associated Generator Control Unit (GCU) trips it offline.
  • Opening of the line contactor (except if the GEN pb-sw is selected OFF).

(GEN and APU GEN FAULT lights are the same)

24
Q

The BUS TIE is normally in the “lights out” configuration. What happens if it is selected OFF?

A

Both BUS TIE contactors OPEN.

25
Q

FAULT: What does the FAULT light on the AC ESS FEED pb-sw indicate?

A

That the AC ESS BUS is not being electrically supplied.

26
Q

What is electrical priority on the aircraft?

A
  • G - Generators (Onside)
  • E - EXT Power
  • A - APU
  • R - RAT
  • B - Batteries
27
Q

If the RAT has deployed but there is no hydraulic fluid quantity in the Blue system, will the RAT generator operate?

A

NO