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c rev > Airbus A320 Electrics > Flashcards

Airbus A320 Electrics Flashcards

1
Q

What are the specifications of the DC System?

A

28 Volts

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2
Q

What are the ratings of the Engine & APU Driven Gens and the Emergency Gen?

A

Engine & APU Driven : 90 kVA

Emergency Generator : 5 kVA

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3
Q

How is the Emergency Generator driven?

A

By the Blue Hydraulic System.

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4
Q

How is constant frequency obtained from the Engine & APU Driven Generators?

A

IDGs : Integrated (Constant Speed) Drive Units

APU : Constant Speed APU

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5
Q

The Static Inverter can supply the AC ESS Busbar.

What is its Source & what does it supply?

A

Source : Battery 1

Supplies : (part of) the AC ESS Bus

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6
Q

When will the Static Inverter be Energised from the Battery even if the Battery Switch is OFF?

A

If Aircraft speed exceeds 50 kts AND the only source of power is the Batteries,

Battery 1 will supply the Static Inverter irrespective of Battery p/b position.

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7
Q

How many TRs are there?

A

3

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8
Q

How many amps can a TR supply?

A

200 Amps

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9
Q

In Normal Operations which TRs are in use?

A

TR1 and TR2 only.

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10
Q

How many batteries are there?

A

2

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11
Q

What is a BCL?

A

Battery Charge Limiter

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12
Q

What do the following colours on Cb collars mean:

  • Green
  • Black
  • Red
  • Yellow?
A

Green - Monitored by ECAM

Black - Not ECAM Monitored

Red - Must not be pulled

Yellow - may be pulled when on batteries only (Early A320 only.)

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13
Q

At any one time there my be 4 main sources of AC Power available :

  • GEN1, GEN2, APU GEN & EXT PWR.

What is the order of Preference of Supply?

A

To either AC Bus,

  1. Onside GEN, then
  2. EXT PWR (if EXT PWR p/b pressed), then
  3. APU, finally
  4. Offside GEN.
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14
Q

Can any of the electrical sources be connected in parallel?

A

NO.

The Bus Ties will prevent this.

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15
Q

In Normal Operations, which AC Busbars are supplied by GEN1 and GEN2?

A

GEN1: AC1 and through AC1 the ESS AC.

GEN2 : AC2

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16
Q

In Normal Operations, how are the TRs supplied?

A

TR1 supplied from AC1

TR2 supplied from AC2

ESS TR is not in use.

17
Q

In Normal Operations what do the TRs supply?

A

TR1 supplies : DC Bus 1, Battery Bus (through DC1) and ESS DC (through Battery Bus)

TR2 supplies : DC Bus 2

ESS TR supplies : nothing

18
Q

In Normal Operations, what do the Batteries supply?

A

Just the Hot Battery Busbars.

19
Q

What is the Normal Source of supply of the “Battery” Busbar?

A

TR1

20
Q

When the AC and DC GROUND/FLIGHT busses are being supplied directly from EXT PWR, does EXT PWR also power the rest of the aircraft Electrical System?

&

What component of the Electrical System is also required to enable DC GROUND/FLIGHT to be energised?

A

NO

&

TR2

21
Q

In Normal Operations are the AC and DC GROUND/FLIGHT busses powered and if so from what source?

A

YES

AC from AC2

DC from DC BUS 2

22
Q

If GEN1 or GEN2 fails in flight, what pilot action is required to ensure that Supplies are maintained to the Electrical System?

A

None.

The opposite generator, or the APU Gen will replace the failed generator automatically.

23
Q

If AC1 Fails, what pilot action is required to regain supply to it?

A

If it does not automatically recover, Use the AC ESS FEED p/b.

This connects AC ESS to AC2 rather than AC1 and hopefully restores it.

AC BUS 1 normally supplies the AC ESS BUS, and, via the TR1, the DC ESS BUS.
In the case of an AC BUS 1 FAULT, the AC ESS BUS and the DC ESS BUS will automatically recover, due to the fact that the AC BUS 2 will automatically supply the AC ESS BUS.
If AC BUS 2 does not automatically supply the AC ESS BUS, the flight crew can recover the AC ESS BUS and the DC ESS BUS by setting the AC ESS FEED pb-sw to ALTN, as requested by the AC ESS BUS FAULT ECAM procedure.

24
Q

What are the specifications of the AC System?

A

3 phase

115/200 Volts

400 Hz

c rev (43 decks)

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