ZW32-12F分界（看门狗）户外智能高压真空断路器为额定电压12KV三相交流50HZ的户外配电设备。该断路器主要用于开断、关合电力统中的负荷电 流、过载电流及短路、速断、接地保护、重合闸次数可选、就地遥控及远程通讯等功能，适用于变电站及工矿企业配电系统中作保护和控制之用。12KV线路T型 接线的用户内部发生故障时，或虽然发生在用户进线开关内侧，但其保护动作时限与变电站出线开关保护不当时，均会造成变电站出线开关保护分闸。如果故障是永 久性的，变电站重合不成功，则一个中压用户界内的事故将使整条配电干线停电。这种电网中常见的波及事故，将对社会造成重大损失。ZW32-12F分界（看 门狗）户外高压真空断路器（以下简称断路器），安装于架空线路的责任分界处，即用户进线的前端，将会自动切除用户内单相接地故障和相间短路故障，避免用户 界内故障波及输电干线，确保非故障用户的用电安全，提高用电可靠性。

ZW32-12F boundary (watchdog) outdoor intelligent high voltage vacuum circuit breaker for rated voltage 12KV three-phase AC 50HZ outdoor power distribution equipment. The circuit breaker is mainly used for breaking and closing the power system load current, overload current and short circuit, fast breaking, grounding protection, reclosing times, optional local remote control and remote communication function and so on, applicable to substations and industrial and mining enterprises in the distribution system for protection and control purposes. 12KV line T connection user when internal fault occurs or that occurred in the user line switch inside, but the protection action time and substation outlet switch protection at the time, can cause the outlet of substation switch protection switch. If the fault is permanent, substation coincidence is not successful, a user in the medium voltage accident will make the whole power distribution lines. A common accident in the grid will cause heavy losses to society. ZW32-12F boundary (watchdog) outdoor high voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker), responsibility boundaries installed on the overhead line, the front end user line, will automatically cut the user in one phase grounding fault and short-circuit fault, prevent users in spread transmission lines, to ensure the safety of electricity users of non fault to improve the reliability of electricity.