亚洲男男gaygay无套I成年人免费观看在线视频I国产高清一级I中文字幕日本在线观看I国产一级黄大片I成人在线一区二区I色综合天天天天做夜夜夜夜做I国产黄在线

ZW20A-12F Outdoor high-voltage AC dividing vacuum circuit breaker

Medium voltage components   

ZW20A-12F type outdoor high-voltage AC dividing circuit breaker is a new intelligent product developed in ZW20A-12, consisting of three major parts: vacuum circuit breaker body, intelligent controller and external voltage transformer, the product is suitable for use as sectional isolation switch and contact switch in 10kV city network and agricultural network overhead ring network lines, and can realize automatic switching device for load deployment in ring network lines, and in large The product is suitable for use as a sectional disconnector and contact switch in overhead ring network lines of 10kV urban and agricultural networks, and as an automatic switching device for load deployment in ring network lines, and as a demarcation switch in branch lines supplied by large users (commonly known as "open-door dog"). The boundary circuit breaker has protection and control functions and can reliably judge and detect the zero sequence current in the boundary to automatically remove single-phase earth faults and phase-to-phase short-circuit faults.