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The Many Factors to Consider When Specifying Thermal Circuit Breakers for Equipment

Authored on: Oct 6, 2009 by Albert Burgler

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Thermal circuit breakers for equipment protect motors and transformers against electrical overloading. The trip release of a breaker takes place with the deflection of a bimetal. This deflection is in turn dependent on heat caused by the level of current flowing through the bimetal. The typical time-current characteristic of a thermal circuit breaker is a result of the thermal delay of the bimetal.

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