What is shunt trip in MCCB?
A shunt trip device is an optionally available accessory in
a circuit breaker that mechanically trip the circuit breaker when power is
applied to the shunt trip coil terminals. The power for the shunt trip coil
does not come from inside the circuit breaker, so it should be supplied from an
outside supply.
What is the function of shunt trip coil?
In electronics, a shunt is a device that creates a low resistance
route for electric current, to allow it to pass around other point in the
circuit. The foundation of the term is in the verb 'to shunt' meaning to turn
away or observe a different path.
Shunt trip coil connection?
1.Connect the neutral wire to anyone terminal of the shunt
trip coil.
2.Connect anyone terminal of the EPO(emergency power off
button) to phase wire of the power from the external power supply.
3.Connect another terminal of the EPO(emergency power off
button) to the another terminal of the shunt trip coil.
Why use shunt trip breaker?
Overall, shunt trip circuit breakers add extra protection
features to circuit breakers and ultimately play an essential role in the
electric system. They shunt off electric power in emergencies and serve to
prevent damage to system and damage to people.
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