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Tel: 86057761720369 
Mobile: 15868721000  
Fax: 86057761736962 
Sales:86057762717369 
Address: Yueqing City, Zhejiang
Province, China Huang seven town
Yueqing City Industrial Zone A  
Post Code: 325604  
Q Q: 35977770  
Website: www.

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   Motor open phase protection switch, air switch) applied to ac 50 hz, rated voltage of 380 v, rated current 250 a circuit, and used as lack of phase, leakage protection, can also be used to prevent due to the damage of equipment insulation, fire danger caused by the grounding fault current. And can be used to protect circuits and motor overload and short circuit, open phase, leak, a line not frequent transformation and also the don't frequent starting of the motor.
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