|Circuit Breaker Operation|
|The following animation shows how a conventional thermal/magnetic
circuit breaker works. Current flowing through the circuit heats the
bimetal current sensor, causing it to bend. When the amount of
bending exceeds a limit, the armature is released and a spring
forces the contacts to open. The load current also flows through a
magnetic current sensor (coil) which creates a magnetic field that
will trip the armature faster than the bimetal strip can respond when
very large currents flow. When the contacts open, an arc will be
generated that is dissipated in the arc channel. This opening to the
outside prevents pressure buildup inside the breaker's case.
In contrast, the Zlan circuit breaker employs state-of-the-art electronic circuitry to distinguish between normal current transients and abnormal short circuits. This allows the breaker to respond more quickly to true circuit overload conditions while still avoiding nuisance tripping.
By opening the circuit in a fraction of a second after detecting an overload, the Zlan breaker significantly reduces the chance for electrical sparks which can start a fire.
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