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FCOM/FCTM/MEL-CDL/MSS A320 > ATA 24 - Electrical > Flashcards

ATA 24 - Electrical Flashcards

1
Q

Description electrical system ?

A

Cf diagram

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2
Q

Engine GEN and APU: kVA, Volt, Hz, phase ?

A

90kVA
115/200V
400 Hz
Tri phases

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3
Q

EMER GEN: kVA, V, Hz, phase ?

A

5kVA
115/200V
400 Hz
Tri phases

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4
Q

Static inverter: kVA, V, Hz, phase ?

A

1kVA
115/200V
400 Hz
Single phase

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5
Q

Batteries: Ah and V ?

A

23 Ah
28 V

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6
Q

Max oil temperature IDG before FAULT ? Auto cut out at which temperature ?

A

180°C = FAULT
200°C = auto cut out

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7
Q

Inhibition of low pressure FAULT light on IDG at below which N2 ?

A

Below 14% N2

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8
Q

Time to charge batteries 100% ?

A

20min

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9
Q

Mini batterie voltage ? What does it ensure ?

A

25,5 V. It ensures 50% minimum capacity (cf SOP)

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10
Q

Priority of electrical sources ?

A

GEN of same side
EXT PWR
APU
GEN opposite side

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11
Q

<—[DC BAT]—>

—[DC BAT]—

> —[DC BAT]—<

meaning ?

A

DC BAT charges batteries above 1A
No charge
Batteries discharge above 1A

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12
Q

GALY and CAB pb controls which system ? What is the shed logic ?

A

AUTO: sheds main galley (ovens, …), in seat power, IFE if 1 GEN only
OFF: sheds also secondary galley ( coffee maker…)

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13
Q

COMMERCIAL pb controls which system ?

A

Cargo / Cabin lights
Water / Waste
Drain mast protection
IFE

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14
Q

Time for RAT deployment and EMER GEN to start ?

A

8 s
Gap filled by BAT

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15
Q

Conditions for auto RAT out ?

A

AC 1 + 2 out
And
Above 100 kt

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16
Q

On EMER GEN conditions, batteries cannot be charged. True or False ?

A

True

17
Q

EMER GEN
When the aircraft is on ground :
- Below XXXkt, DC BAT BUS is automatically connected to the batteries.
- Below XXX kt, AC ESS BUS is automatically shed, leading to the loss of all display units.

A

100kt
50kt

18
Q

Autonomy flight on BAT only ?

A

30min

19
Q

Meaning of green breaker ?

A

ECAM monitored
After 1 min message on ECAM

20
Q

Meaning of black breaker ?

A

Not ECAM monitored
Only associated with system fault message

21
Q

Meaning of yellow breaker ?

A

May increase BAT life if tripped (old aircraft)

22
Q

Meaning of red breaker ?

A

WTB. No reset.

23
Q

How many times can you reset a breaker ?

A

1 time. Follow procedure

24
Q

CLR pb effect on breaker ?

A

Inhibits any CB tripped on same panel

25
Q

EMER CANCEL pb effect on breaker ?

A

Inhibits caution

26
Q

On ground, if only the batteries are powering the emergency generation network, APU start is only available when the speed is below XX kt ?

A

100kt

27
Q

Normal electrical distribution ? (Diagram)

A

GEN 1 — AC 1 bus — TR 1— DC 1 bus — DC BAT bus —DC ESS bus BAT 1 BAT 2
| | | |
AC ESS bus DC ESS bus Hot bus 1 Hot bus 2
+ Shed + Shed

GEN 2 — AC 2 bus — TR 2— DC 2 bus

28
Q

When no other power is available in flight, the static inverter converts _____ power to AC power for the AC ESS bus; and ______ powers the DC ESS bus

A

BAT 1
BAT 2

29
Q

When BAT FAULT light will illuminate ?

A

Charging current increase abnormally

30
Q

Is it possible to parallel generators?

A

No

31
Q

What is the significance of the circuit breakers on the overhead panel?

A

They may be operational in the Emergency Electrical Configuration.

32
Q

If a TR 1 fails, show distribution diagram ?

A

GEN 1 — AC 1
|
AC ESS + shed — TR ESS — DC ESS

GEN 2 — AC 2 — TR 2 — DC 2 — DC BAT — DC 1

33
Q

In flight, in case of loss of all main generators, EMERGENCY GENERATOR not running, the STATIC INVERTER supplies which bus ?

A

AC ESS bus ( APU, ENG start…)

34
Q

What happens during the EMER GEN TEST if AC NORMAL BUSES are supplied ?

A

EMER GEN is supplied by Blue electrical pump if operating
+
AC ESS and DC ESS are connected to EMER GEN

(If only the batteries supply the aircraft:
The static inverter powers the AC ESS BUS.)

35
Q

When is the DC BAT BUS supplied by the batteries ?

A

APU starting
and
AC1 & 2 lost with speed< 100kt

36
Q

In emergency configuration, when is AC ESS SHED and DC ESS SHED BUS automatically shed ?

A

During RAT deployment

37
Q

Is the ESS TR used when a TR is faulty ?

A

Yes

38
Q

When GEN 1 or GEN2is selected to “OFF” position. Does GEN are still energized or de-energized ?

A

De-energized and line contactor opens

FCOM/FCTM/MEL-CDL/MSS A320 (27 decks)

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