Electrical

Question 1

The electrical power system consists of a three-phase

Answer 1

115/200 V 400 Hz constant-frequency AC system and a 28 V DC system

Question 2

In normal configuration, the electrical power system provides

Answer 2

AC power.

Question 3

if all main generators fail, AC energy is supplied by

Answer 3

Blue hydraulic circuit.

Question 4

A static inverter transforms DC power from Battery

Answer 4

1 into one KVA of single-phase 115 V 400 Hz AC power, which is then supplied to part of the AC essential bus.

Question 5

if only the batteries are supplying electrical power to the aircraft, When the aircraft speed is above

Answer 5

50 kt, the inverter is automatically activated, if only the batteries are supplying electrical power to the aircraft, regardless of the BAT 1 and BAT 2 pushbutton positions.
If below 50 kt, only if BAT1 and BAT2 pb are ON.

Question 6

Two main batteries, each with a normal capacity of_______, are permanently connected to the______.

Answer 6

23 Ah/two hot buses

Question 7

The aircraft has two types of C/Bs:

Answer 7

‐ Monitored (green): When out for more than 1 min, the C/B TRIPPED warning is triggered on the ECAM. ‐ Non-monitored (black)

Question 8

One engine generator can supply the entire network, except

Answer 8

the DC BUS Entertainment.

Question 9

DC power

TR 1 normally supplies DC BUS 1,

Answer 9

DC BAT BUS, and DC ESS BUS

Question 10

The two batteries are connected to the

Answer 10

DC BAT BUS, if they need charging

Question 11

The system automatically replaces the failed generator, with the :

Answer 11

‐ APU GEN, if available, or ‐ Other engine generator.

Question 12

The contactor of each TR opens automatically, in case of :

Answer 12

‐ Overheat

‐ Minimum current

Question 13

If both AC BUS 1 and AC BUS 2 are lost and the aircraft speed is above ____ kt, the Ram Air Turbine (RAT) extends automatically. This powers the ______ hydraulic system, which drives the emergency generator by means of a hydraulic motor.

Answer 13

100/blue

Question 14

Automatic battery contactors open when:

Answer 14

‐ The aircraft is on the ground ‐ The BAT pb switches are at AUTO ‐ The main power supply (EXT PWR + GEN) is cut off ‐ Battery voltage is low.

Question 15

1.Maintaining the IDG pb-sw during more than _____ may damage the IDG disconnection mechanism. 2.Disconnect the IDG only when the engine is ________ or _______. If not, the IDG will be damaged when starting the engine.

Answer 15

3 s/ running / windmilling

Question 16

ECAM caution comes on, if: ‐ IDG oil outlet overheats (above °C), or ‐ IDG oil pressure is low (inhibited at low engine speed: N2 below %). It extinguishes when the IDG is _____.

Answer 16

180/14/disconnected

Question 17

ECAM

GALLEY SHED indication This legend appears in white when:

Answer 17

‐ The GALLEY pb-sw is OFF, or ‐ The main galleys are shed, meaning: • In flight, only one generator is operating. • On ground, the aircraft is being supplied by one engine generator only. The legend is not displayed, when the aircraft is in its normal configuration.

Question 18

ECAM

The TR voltage is normally in green. It becomes amber, if

Answer 18

V > 31 V, or V < 25 V