问题
问答题 简答题
母差保护、失灵保护为何加复合电压闭锁元件的目的是什么？
答案
参考答案：
目的：当母联断路器首先跳开后无故障母线的复合电压闭锁装臵将返回，使母差（失灵）保护跳无故障母线的线路回路增加了一个断开点，进一步保证不误动；防止人员误碰母差（失灵）保护出口继电器时，发生母差（失灵）保护误动作。
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母差保护、失灵保护为何加复合电压闭锁元件的目的是什么？
参考答案：
目的：当母联断路器首先跳开后无故障母线的复合电压闭锁装臵将返回，使母差（失灵）保护跳无故障母线的线路回路增加了一个断开点，进一步保证不误动；防止人员误碰母差（失灵）保护出口继电器时，发生母差（失灵）保护误动作。
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| __1__ weekends, I often go to movies __2__ my friend, David. My__3__ movie star is Jackie Chan. He's a great __4__ . He has a new movie, Speed. It's a very __5__ action movie. I think it's exciting. Jack likes Michele Yan (杨紫琼) __6__ . He likes her famous movie, Sleepless Night. It's a thriller. I don't think it's great. __7__ , it's boring. One thing is interesting. Jack __8__ likes Beijing Opera. He often __9__ me, "Beijing Opera is really __10__!" My father likes it too. He even wants to be a Beijing Opera artist! | |||
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