午夜精品视频在线无码,老司机久久精品最新免费,无遮挡A级毛片免费看,人禽杂交18禁网站,人妻少妇无码精品视频区,人妻少妇无码中文幕久久,久久精品99国产精品日本,久久丫精品国产,精品亚洲AV成人无码明星换脸,japanese日本熟妇多毛

 
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