Difference between revisions of "怎样考取低压电工证理论篇"
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怎样考取低压电工证理论篇
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* 三相笼形异步电机有直接启动、降压启动两种方式。降压启动又分:定子串电抗,星三角形,软起动器,自耦变压器,串电阻
* 刀开关在作隔离开关选用时,要求刀开关的额定电流要小于线路实际的故障电流,实现隔离
* 雷电分为直击雷、感应雷、球形雷。直接劈的是直击雷,造成架空线路产生高电压的是感应雷,进屋的是球形雷
。
* 喷雾增湿剂可以使静电荷沿<i>绝缘体表面</i>向四周泄漏。油罐车安装接地锁链,是为了泄漏行车过程中产生的静电荷
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