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高压输电线路的故障，绝大部分是
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高压输电线路的故障，绝大部分是
A、单相接地短路
B、两相接地短路
C、三相短路
D、两相相间短路
时间：2021-09-01 20:45
关键词：
联大
河南理工大学
电气工程及其自动化
微机继电保护
答案解析
A
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高压断路器在电路中的作用是：在正常负荷下闭合和开断线路，在线路发生短路故障时。通过继电保护装置的作用将线路自动断开。故高压断路器承担着控制和保护双重任务。
A cabinet or space containing the controls or valves for the fixed firefighting system must be（）.
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高压断路器在电路中的作用是：在正常负荷下闭合和开断线路，在线路发生短路故障时，通过继电保护装置的作用将线路自动断开。故高压断路器承担着（）和（）双重任务。
当输电线路发生短路故障时，线路继电保护中的振荡闭锁起动元件动作。
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