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How The Circuit Breaker Works
Sep 04, 2018

The circuit breaker is generally composed of contact system, arc extinguishing system, operating mechanism, tripping device, shell, etc. When the short circuit, the large current (typically 10 to 12 times times) generated by the magnetic field to overcome the counter-force spring, the release of the operating mechanism pull the action, switching instantaneous tripping.

When overloaded, the current becomes larger, the calorific value intensifies, the bimetal plate deforms to a certain extent to promote the mechanism action (the larger the current, the shorter the action time). Electronic type, using a transformer to collect the current size of each phase, compared with the set value, when the current is abnormal when the microprocessor sends a signal, so that the electronic tripping device to drive operating mechanism action.

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