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High voltage switch energy storage motor connection and overload requirements

Mar 05, 2019

The high-voltage switch energy storage motor is generally composed of a contact system, an arc extinguishing system, an operating mechanism, a trip unit, a casing, and the like. When short-circuited, the magnetic field generated by a large current (generally 10 to 12 times) overcomes the reaction force spring, the trip unit pulls the operating mechanism, and the switch instantaneously trips.

When the high-voltage switch energy storage motor is overloaded, the current becomes larger, the heat is increased, and the bimetal is deformed to a certain extent to push the mechanism (the larger the current, the shorter the action time). If there is an electronic type, the current of each phase is collected by using a transformer, and compared with the set value, when the current is abnormal, the microprocessor sends a signal to cause the electronic trip unit to drive the operating mechanism.

The energy storage of the high-voltage switch energy storage motor mainly refers to stretching the closing or opening spring to have corresponding potential energy. It's like giving a trigger on a gun. The energy storage spring is connected to the closing or opening mechanism. When the closing or opening is performed, the closing or opening electromagnet acts, and after the "trigger" is pulled, the closing or opening spring quickly closes or separates the moving contact of the circuit breaker, the main purpose of which is to lower The arc of the closing or opening has a time to achieve rapid arc extinguishing. Some circuit breakers can be stored in either manual or electric mode.