Vacuum circuit breaker ZW20A-12C

three-phaseACoverload

ZW20A-12C type AC H.V. vacuum pole automatic controller is used in tri-phase electric system of AC 50Hz, rated voltage 12kV. It can breaking and closing load current, overload current and short circuit fault current, as a device to control and protect electrical network. 2.Main functions The controller is an intelligentized device, matches sectionalizer to reach distribution automation without other control system. Consist of circuit breaker (with mechanism operation), controller and control power, besides to opening of closing regular and fault current as circuit breaker, it can repeatedly auto reclosing by advanced setting times for sectionalizer to isolate fault circuits when the short circuit fault happen. The non-fault lines will resume power supply; if repeatedly auto reclosing failed, closing and interlock inside of the controller, another side of network, originally closing and interlock status will remove interlock and auto closing, non-fault lines resume power supply at once. The network automation could limit the power supply interrupted district into minimum range, it has high social benefit and economical benefit The product is practical and reliable, multiple functional, the controller uses microprocessor, the panel shown in digital, conveniently with person-machine talking, all the parameters could be adjusted, new function of GPRS communication system could achieve opening, closing operation and teledata communication function by mobile phone, it can transmit lines parameters and running state of the equipment.