E Controls and Protections Flashcards
Aircraft convention for an on switch?
In the up position
What colour is the battery master switch?
Red
What are the different types of switches?
- Toggle
- Rocker
- Push button
- Rotary
- Guarded
- Automatic/Semi-automatic
What does a white push button switch mean?
Abnormal, off position
What does a amber push button switch mean?
Caution
What does a red push button switch mean?
Warning
What does a blue push button switch mean?
On
What does a green push button switch mean?
Available (avail)
What does a double dot push button switch mean?
Signifies that part of the switch is not used
What is the danger of automatic/semi-automatic switches?
Failure to notice the operation of these switches can lead to confusion
3 types of circuit protection?
- Cartridge fuse
- Thermal circuit breaker
- Thermo-magnetic circuit breaker
What do thermo circuit breakers use to release the latch?
Bimetallic strip
Can you reset a circuit breaker?
Yes, but not routinely
What is a trip free circuit breaker?
Holding the reset button in whilst the fault exists will not reconnect the circuit
What is a non trip free circuit breaker?
Holding the reset button in whilst the fault exists will reconnect the circuit
What can happen with repeated resetting of circuit breakers?
Electrical fire
What happens if you replace a fuse with one of a higher rating?
May lead to electrical fires or damaged cabling
What happens if you replace a fuse with one of a lower rating?
May lead to the component not working at all due to early fuse blow
What is a green circuit breaker?
Monitored, tripped for more than 1 minute will result in an ECAM warning
What is a black circuit breaker?
Unmonitored, the crew will need to discover a tripped condition
What is a red capped circuit breaker?
Installed with locking collars that prevent reset in flight
What is a fuse made of?
A small copper PTC material
