电压和电流互感器二次侧为什么要接地?
参考答案:
因为互感器一次绕组处于高电压,而二次绕组为低电压,如果互感器的绝缘击穿,高电压将直接加到二次绕组,影响人身安全及设备安全。
根据所给汉语完成单词。
1. Peter didn't _______ (意识到) his mistake at that time.
2. The old man was too tired and he was moving _______ (慢).
3. Don't be _______ (害怕) to ask for help if you need it.
4. I want to _______ (加入) an English club to make more friends who have the same interest.
5. You can _______ (容易) understand if you often listen to it.
废气分析仪在使用时应将取样探头插入排气管中,插入深度不小于()毫米
A、200
B、300
C、400
D、500