ZW20A-12F/M Outdoor Medium Voltage AC Vacuum Circuit Breaker with permanent magnet boundary

ZW20A-12F /M-type outdoor high voltage AC vacuum circuit breakers permanent magnet boundary (hereinafter referred to as the cut-off circuit breaker) is a new intelligent products based on the research and development of ZW20A-12F circuit breaker.It mainly configures with a permanent magnet vacuum breaker body, MGK41 controller, an extemal voltage transformer.

This products is widely used in 10Kv urban and rural distribution network overhead ring circuit as the isolation switch and the contact switch, can realize ring load current deployment of automation switching means, as the boundary switch (commonly known as “watchdog”) in large user-powered branch line, the boundary breaker has a protective control functions and communication capabilities. It can reliably determine and detect boundary milliamps another zero-sequence current and phase short circuit fault current, to automatically remove single- phase ground fault and phase phase short circuit fault.