... CE,CCC,ISO9001,etc 3) timely delivery modern electric switch OverviewZFK composite switch is a new generation of AC contactor .1) using ... , zero-voltage time-division off the circuit , using electric shock load . 2) all the working process of the power grid without ... can also be used for motor starting control and resistive load switching , do not need to install radiatorCONDITIONS OF USE 1 ...