16. Electrical✅

Question 1

What is the minimum battery voltage?

Answer 1

25.6

Question 2

What would a pilot do if battery voltage is 25.5 or below on originating preflight?

Answer 2

Charge the battery with external power by selecting battery pbs to AUTO

Question 3

How long would you charge the batteries?

Answer 3

20 minutes and re-check the voltage

Question 4

Explain how to conduct the battery check

Answer 4

🔷Select ELEC on ECAM
BAT 1 & 2 OFF then ON
Check BAT charge current is <60 amps and decreasing within 10 seconds

What if it fails the test? Call maintenance

Question 5

Describe the electrical power system of the aircraft

Answer 5

🔷Three phase 115/200 volt 400 Hertz constant frequency AC system with a 28 Volt DC system.
🔷Normally this system produces alternating current, some of which it then transform into direct current for certain applications.
🔷Each of the aircraft three generators can supply the whole network.
🔷If all normal AC generation is life, and emergency generator can supply AC power.
🔷If all AC generation is lost, the system can transform DC power from the battery into AC power.

Question 6

If all AC power is lost what happens?

Answer 6

DC power from the battery that is converted into AC

Question 7

The engine GEN fault light is illuminated prior to engine start. Is this normal?

Answer 7

Yes

Indicates Fault

Question 8

What is an IDG and describe how it works

Answer 8

Integrated Drive generator

Take a variable engine output and gives a constant output

Question 9

How would a pilot disconnect the IDG?

Answer 9

Lift the red guard and push the IDG pb switch. Don’t hold for longer than three seconds

Question 10

Can the IDG be reconnected?

Answer 10

No, this is a maintenance function

Question 11

Describe the function of the BUS TIE in AUTO

Answer 11

🔷Allow single source of power to run entire electrical system
🔷Allows connection of the APU GEN or EXT power to system
🔷Inhibits multiple sources connected simultaneously

Question 12

If GEN 1 fails to supply AC BUS 1, what happens?

Answer 12

Gen 2, AC BUS 2 Powers the system through the BUS TIE

Question 13

How is the AC ESS BUS normally power?

Answer 13

From AC BUS 1

Question 14

If AC BUS 1 fails, how is the AC ESS BUS Powered?

Answer 14

AC BUS 2 Automatically feeds the AC ESS BUS

Question 15

What indication will you get on the ELEC panel that AC BUS 2 is feeding the AC ESS BUS?

Answer 15

AC ESS FEED ALTN Light on

Question 16

What does a galley fault light indicate?

Answer 16

At least one generator load is above 100% rated output

Question 17

Explain the auto function of the galley push button

Answer 17

Sheds the main gallery if only one generator is available in flight or

Sheds the main gallery if one generator is available on the ground

Question 18

How is the battery bus normally powered?

Answer 18

DC bus 1 through the DC TIE Contactor

Question 19

What buses are powered by the Beamer generator?

Answer 19

AC Essential bus
AC ESS Shed
DC Essential bus by the Essential TR
DC ESS Shed

Question 20

What is the difference of the APU generator fault in the engine fault?

Answer 20

Both are indicators of a line contactor open.

The difference is the engine Gen fault may also indicate a fault detected by the ENG GCU

Question 21

What does a BAT fault light indicate?

Answer 21

Battery charging current outside limits

BAT contactor opens

Question 22

When are the batteries connected to the battery bus?

Answer 22

APU start

Battery charging

AC bus 1 and 2 not powered and airspeed below 100 knots