主要用于交流 50Hz，供遠距離接通和分斷電路頻繁地起動和控制交流電動機之用，并可與適當?shù)臒崂^電器組成電磁起動器以保護可能發(fā) 生操作過負荷的電路。

Mainly used for systems of AC 50Hz，for long distance making and breaking circuits For frequently starting and control of AC motors, and can be used with suitable thermal relay to constitute electromagnetic starter to protect against possible overload.

技術參數(shù) Technical parameters

額定工作電流：40A/50A 

額定工作電壓：240V 

觸頭數(shù)：3P

Rated operating current：40A/50A 

Rated operating voltage： 240V 

Number of contacts： 3P