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Search FAQs

How does a shunt trip work to trip a circuit breaker?

Product Line:
Circuit Breakers

Environment:
Applies to all shunt trip accessories, whether field or factory installed.

Resolution:
A shunt trip device is an optional accessory in a circuit breaker that mechanically trips the breaker when power is applied to the shunt trip terminals. The power for the shunt trip does not come from within the breaker, so it must be supplied from an external source. Some circuit breakers allow field installlation of a shunt trip kit, while others require factory installation when the breaker is ordered. Check the specific breaker type for available AC and DC shunt trip voltage ratings and for the method of installation.
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