Circuit breaker we came across the circuit
while analyzing various circuits or electrical connection in home etc…
The basic idea is
nothing but Fuse (which melts and cut of its connection while heavy current
flows in order to safeguard the loads) similarly it detach from the network
where as fuse once break means we have to replace it by new one but in case of
circuit breaker it may reconnect by switching on ..
Working
The diagram on the
right shows the set of a basic circuit breaker. It is pretty self explanatory,
but this article will go through the steps involved when a circuit breaker cuts
off the power to prevent damage or injury following a current surge.
First of all, on the
diagram we see that the electricity comes from the right hand side, through a
live wire. This wire is the wrapped around a magnet, making it into an
electromagnet. The wire then continues along the circuit, along a pivot fixed
in place by a spring, then there are two contacts at the top left of the
diagram. When all is fine and the current is not to strong, the electricity
passes along the contacts and then continues to its destination.
However, if there is a surge in the current,
the current through the live wire and around the magnet will become so high
that the electromagnet manages to pull the right hand contact away from the
other and clicks the pivot into the second position (it moves clockwise). This
is why you hear a clicking noise. The spring makes sure that the pivot doesn't
move back again. When you reset a circuit breaker by flicking a switch, you are
manually pushing the pivot back to its original position, allowing electricity
to flow through the contacts again.
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