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Systems > Electrics > Flashcards

Electrics Flashcards

1
Q

Pneumonic for remembering electric priorities

A

GEAR B

Gen
Ext pwr
APU
RAT
Batt
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2
Q

How is DC ESS BUS fed

A

DC BUS 1 (TR1)

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3
Q

Screens loose with AC BUS 2

A

PFD2 ND2 Lower ECAM

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4
Q

Don’t push IDG disconnect button for longer than…

A

3 sec

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5
Q

In flight which gen has the higher load and why?

A

Gen 1

Powers AC ESS BUS

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6
Q

How long does emer gen take to come online?

A

8 sec

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7
Q

When emer gen coming online, what is powering the aircraft at this time? What is powered?

A

Batteries

PFD1
Upper ECAM
FMGC1

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8
Q

AC ESS is normally supplied by

A

AC BUS 1

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9
Q

DC BATT BUS can be supplied by:

A

DC BUS 1
DC BUS 2
batteries

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10
Q

AC bus tie contractors enable…

A

Electrical system to be supplied by any generator or ext power

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11
Q

What happens during an emer gen test?

A

Emer gen is driven hydraulically if the blue electric pump is running

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12
Q

What happens when Gen 1 line push button is set to off?

A

AC BUS 1 is powered by gen 2 because gen 1 line is open

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13
Q

When does the static inverter work?

A

Aircraft speed below 50kts
SI automatically
Activated if nothing but batteries are supplying the aircraft

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14
Q

Static Inverter transforms DC voltage from batteries into:

A

Single phase 115v 400hz current

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15
Q

Loss of all generators AND emer gen

How is DC ESS BUS supplied?

A

HOT BUS 2

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16
Q

All generators fail, emerg GEN ON, how is DC ESS BUS supplied?

A

ESS TR

17
Q

If AC BUS 1 fails, the AC ESS bus is supplied by

A

Ac BUs 2

18
Q

Batteries only elec source, AC ESS bus is supplied by

A

Static inverter

19
Q

What happens when a generator is selected off?

A

Gen is de energised and contractor opens

20
Q

External power green avail means

A

Ext power is connected and parameters are normal

21
Q

BAT FAULT light means

A

Charging current is outside limits

Systems (12 decks)

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