Electrical

Question 1

What types of Circuit Brakers are there?

Answer 1

FCOM DSC 24 10 20 Circuit Brakers (C/B’s)
The aircraft has 2 types of CBs:
* Monitored: when out for more than 1 minute, the C/B TRIPPED warning is triggered on the ECAM.
* Non-monitored
* WTB CBs: non-resettable, preventable by red caps on them.

Question 2

Which C/Bs can never be re-engaged?

Answer 2

QRH C/B TRIPPED

On ground:
Do not reengage the circuit breaker (C/B) of the fuel pump(s) of any tank. For all other C/B, if the flight crew coordinates the action with maintenance, the flight crew may reengage a tripped C/B, provided that the cause is identified.

In flight:
Do not reengage a circuit breaker (C/B), unless the captain judges it necessary to do so for the safe continuation of the flight. Only one reengagement should be attempted.

Question 3

What should you do if electrical power supply is interrupted during the engine start process (indicated by loss of DU’s)?

Answer 3

OM B 2.3.8.1 Automatic Engine Start
Abort the start by switching OFF the ENG MASTER. Then perform a 30s dry crank.