Electrical

Question 1

If AC BUS 1 fails, will the AC ESS BUS remain powered?

Answer 1

Yes

Question 2

If AC BUS 1 fails, which bus supplies the AC ESS BUS?

Answer 2

AC BUS 2

Question 3

What is indicated by a FAULT light in the GEN pb?

Answer 3

• The associated generator control unit (GCU) trips, or

- The line contactor opens (except if GEN pushbutton is selected OFF)

Question 4

What does a BAT OFF light represent?

Answer 4

1. Battery charger limiter is not operating
2. OFF light illuminates if the DC BATT BUS is powered
3. HOT BUSes remain powered

Question 5

What does the green EXT PWR AVAIL light indicate?

Answer 5

External power is connected to the airplane and is good.

Extinguishes if ON is illuminated or if the external power is disconnected.

Question 6

What does the blue EXT PWR ON light indicate?

Answer 6

External power is connected (supplying power) to the electric system

Question 7

What does the battery charger limiter automatically control?

When the BAT 1 and 2 are selected on

Answer 7

Connection and the disconnection of the corresponding battery to the DC BAT BUS (by closing and opening of the battery line contactor).

Question 8

What does a BAT FAULT light represent?

Answer 8

-Comes on amber, accompanied by an ECAM caution, when the charging current for the corresponding battery is outside limits. In this case the battery contactor opens.

Question 9

What does the AC ESS FEED FAULT light represent?

Answer 9

AC ESS BUS is not powered

Question 10

What does a FAULT light in the IDG 2 pb represent?

Answer 10

High oil temperature / Low oil pressure

Question 11

During a One Engine Taxi:

• Which GEN is powering AC BUS 1?
• AC BUS 2?

Answer 11

• AC BUS 1: GEN 1

- AC BUS 2: APU (Via Bus Tie)

Question 12

Refer to the panel below: The aircraft is parked at the gate following a single engine taxi. What electrical source(s) are supplying AC BUS 1 and AC BUS 2?
[GEN 1 pb: dark
APU GEN pb: dark
BUS TIE pb: dark
EXT PWR pb: ON
GEN 2 pb: FAULT]

Answer 12

• GEN 1 powers AC BUS 1

- EXT PWR powers AC BUS 2

Question 13

What does the smoke light in the GEN 2 Line pb indicate?

Answer 13

Smoke is detected in the avionics ventilation duct

Question 14

What occurs when the GEN 1 LINE pb is selected OFF?

Answer 14

• GEN 1 line contractor opens
• AC BUS 1 channel supplied from GEN 2 through the bus tie contactors
• Seperate circuit is energized from GEN 1 to supply power to one fuel pump in the main tank

Question 15

What is indicated by a RAT and EMER GEN FAULT light?

Answer 15

EMER GEN is not supplying power when AC BUS 1 and AC BUS 2 are not powered

Question 16

With the RAT MAN ON switch in AUTO, what will cause the RAT to deploy?

Answer 16

AC BUS 1 and 2 not supplied, Aircraft speed greater than 100KTS

Question 17

What will happen if you press the RED guarded MAN ON pushbutton?

Answer 17

Manual RAT extension - Even on the ground

Question 18

Which hydraulic system is pressurized by deployment of the RAT?

Answer 18

Blue

Question 19

How long does it take for the EMER GEN to couple after RAT deployment?

Answer 19

Approximately 8 seconds