Working principle of over heat relay

 The working principle of thermal relay is the heat generated by the current flowing into the heating element, the bimetal have different coefficients of expansion deformation, when the deformation when it reaches a certain distance on the push rod moves, the control circuit is disconnected, so that the contactor is power off, the main circuit is disconnected, the motor overload protection. As an overload protection device, the relay is widely used in production, which has the advantages of small size, simple structure and low cost.


Post time: Sep-02-2016
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