Specifications Rated Current :40A~500A,3P,4P only

with key protection.

3 position( I -0- II )

Why choose us:
1. The biggest ATS manufacture in China - more than 300 companys make OEM,ODM order from us
2. Exporting experience - We have export to all over the world for more than 7 years.
3. Annual sales- The total Annual sales is about USD17,000,000.
4. Certification - We have passed ISO9001:2008 Quality Management System and CCC,? CE Three Position Automatic transfer switch YES1-S ?YES1-S Series Automatic Transfer Switch is PC switches.It applicable in AC 690V,rated frequency is 50/60Hz.The main power source have lost phase,over voltage,under voltage those faults.The controloller control transfer switch,it will choose the load from main power source change over to backup power source(But the backup power source must is normally).User also can choose the load in the middle position, no matter in the main power state or in the standby power state;The product is Mainly used for the nationally specified first-grade current, the product is applicable to the occasions requiring continuous normal power supply such as high-rise building, post and firefighting, coalmine and shipping, chemical metallurgy, industrial production line, medical sanitation, military facilities, etc. Two segment have two transfer states: power A supply-power B supply(we called YES1-L) Three segment have three transfer states: A supply-middle position -power B supply(We called YES1-S with YCU-C or YCU-H controller) The rated working voltage AC660V/690,AC380/400V,the110V switch as special order. ? ?