国产精品老熟女露脸视频,一本一久本久A久久精品综合,无码人妻精品一区二区三区夜夜嗨,亚洲热妇无码AV在线播放,亚洲精品无码久久久久牙蜜区,国产精品久久久久久久久电影网,亚洲精品无码专区久久,国产精品无码久久综合,无码专区国产精品视频,人妻人人澡人人添人人爽人人玩

 
location:indexTRENDS
How does the circuit breaker be locked?
Posted in:[2017-09-09] Click:
How does the circuit breaker be locked?

How can the wiring between the two circuit breakers be achieved and can not be closed at the same time? Circuit breaker lock manufacturers and we talk about.

A method of mechanical interlocking. Low-voltage circuit breakers are generally interlocking accessories optional (connected with the middle of the cable), high pressure generally use the program lock.

Another method is the electrical interlock, that is, in the circuit breaker closing circuit into another circuit breaker normally closed contact, so that it can not open the electrical. The drawback of this method is that it can not prevent manual closing.

Safety lock equipment is to prevent this accidentally open a planned security protection equipment. By taking the appropriate safety / lock equipment can avoid many industrial safety accidents.


information