Controlling and protecting electrical equipment switch selects modular design single product variety form, integrating traditional isolation switch (circuit breaker), AC contactor, overload (or over current, break phase) protecting car relay, intelligent electric running integrated protector, starter, signal isolator, electric motor integrated protector and other low voltage electrical goods key functions, with long distance full automatic control and on-site immediate human resources control function, with control panel signage and mechanical engineering data signal alert function, with over voltage low voltage protection function, with interrupted phase protection function, with harmonious interaction between one current flow protection characteristics (with overload long court time, overload short court time, short circuit failure moment three phase protection characteristics).

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