Electrics 4 - circuit control and protection Flashcards
1
Q
A toggle has how many positions?
A
two or three
2
Q
What is special about a gated toggle switch?
A
Has to be lifted out before it can be moved
3
Q
Some switches have a feature that means you can’t control them accidentally. How are they described?
A
Guarded
4
Q
What two components protect a circuit from an over-current?
A
Fuse
Circuit breaker
5
Q
The wire in a fuse is called what?
A
PTC
6
Q
What component would break a circuit if it was too hot?
A
A thermally activated circuit breaker
7
Q
A magnetically operated circuit breaker does what?
A
Uses an electromagnet to open/close the switch.
This type can be made sensitive to current direction
8
Q
Fuses and CBs are rated for a certain current.
A
Over this current, and the fuse / breaker will pop
