Electrics Flashcards
What is the output of the electrical system in normal operation?
90KVA, 115-200V plus a 28v battery system.
What is the Bus Tie?
Enables power to be transferred from one side to another, thus enabling the APU to power both sides 1 & 2. Also, in the emergency electrical configuration, the system can be split to try to restore either sides power supply.
What is the output of the Emergency Generator?
5KVA
What types of circuit breakers are there?
Monitored and unmonitored. Monitored are green and when tripped, after 1 minute an ECAM caution appears. Unmonitored are black and do not trigger any ECAM warnings. Wing tip brake CBs have a red collar to prevent these being reset inflight.
What is a major consequence of a TR 1 & 2 failure?
DC Bus 1 & 2 failure.
How is electricity generated in abnormal situations?
The emergency generator, powered by the RAT, can supply 5KVA AC power. This powers the AC Essential bus and DC Essential bus through the Essential TR.
In flight and on battery power only, what do the batteries supply?
Battery 1 supplies AC Essential Bus via the static inverter. Battery 2 supplies the DC Essential Bus.
When will the electrical system be powered by only the batteries?
If AC Bus 1 & 2 fail then the RAT will be deployed. This process takes 7 - 10 seconds before the generator comes on line and in this time, the batteries supply power.
What is the difference between deploying the RAT on the HYD panel and on the ELEC panel?
With the RAT deployed in the HYD panel: only the RAT extends, pressurises the Blue HYD system.
With the RAT deployed on the EMER ELEC panel: RAT extends and the emergency generator is coupled. During RAT extension and emergency generator coupling (about 8 seconds), the batteries power the emergency generation network. Emergency generator coupling occurs 3 seconds after the RAT is supplying the emergency generator.
What powers the AC ESSENTIAL BUS?
AC BUS 1 or AC BUS 2 via the ESS FEED pb.
What is the aircraft status if you lose AC BUS 1?
CAT I
