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 (view source)

Revision as of 15:20, 19 August 2024

119 bytes added ,  19 August
→‎理论
* 万用表实质是一个带有整流器的磁电式仪表.万用表由表头、测量电路及转换开关三个主要部分组成.滚轮卡棘轮
* 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
 
== 术语 ==
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