Elec

Question 1

What is the minimum battery voltage?

Answer 1

25.6V

Question 2

What should be done if battery voltage is 25.5V or below on preflight?

Answer 2

Charge batteries using external power by setting BAT pushbuttons to AUTO

Question 3

How long should the batteries be charged before rechecking voltage?

Answer 3

20 minutes

Question 4

How do you conduct the battery check?

Answer 4

Select ELEC ECAM page, turn BAT 1 and 2 OFF then ON, check charging current <60 amps and decreasing within 10 seconds

Question 5

If the battery check fails, what should you do?

Answer 5

Wait for charging to complete and repeat the test

Question 6

Describe the electrical power system.

Answer 6

3-phase 115/200V AC 400Hz system + 28V DC; generators create AC, some converted to DC; all generators can power the full network

Question 7

If all AC power is lost, what happens?

Answer 7

Battery DC is converted to AC

Question 8

What GEN pushbutton indication is expected before engine start?

Answer 8

FAULT

Question 9

What is an IDG?

Answer 9

Integrated Drive Generator — converts variable engine RPM to constant output frequency

Question 10

How is an IDG disconnected?

Answer 10

Lift red guard, push IDG pb (not longer than 3 sec) — only after confirming with other pilot

Question 11

Can a flight crew reconnect an IDG?

Answer 11

No — maintenance only

Question 12

Describe the BUS TIE in AUTO.

Answer 12

Connects AC BUS 1 and 2 if needed; enables APU GEN or EXT PWR to power the system; prevents simultaneous sources

Question 13

If GEN 1 fails, how is AC BUS 1 powered?

Answer 13

Through BUS TIE using GEN 2 (or APU GEN)

Question 14

How is the AC ESS BUS normally powered?

Answer 14

From AC BUS 1

Question 15

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

Answer 15

Automatically from AC BUS 2

Question 16

What indicates that AC ESS is being powered by AC BUS 2?

Answer 16

AC ESS FEED ALTN light (only when manually selected)

Question 17

What does a GALLEY fault light indicate?

Answer 17

At least one generator is above 100% load

Question 18

What does the GALLEY pushbutton do in AUTO?

Answer 18

Sheds main galley power if only 1 GEN is online

Question 19

How is the BATTERY BUS normally powered?

Answer 19

Through DC BUS 1 via the DC tie contactor

Question 20

What buses are powered by the EMER GEN?

Answer 20

AC ESS, AC ESS SHED, DC ESS via ESS TR, DC ESS SHED

Question 21

What does a BAT FAULT light indicate?

Answer 21

Battery charging current is out of limits; BAT contactor opens

Question 22

When are the batteries connected to the BATTERY BUS?

Answer 22

APU start, battery charging, or if both AC BUS 1 & 2 are lost and airspeed <100 knots