... 2) certificares CE,CCC,ISO9001,etc 3) timely delivery Power switch It can in place of circuit breaker , protector , ... relay , contactor . OverviewZFK composite switch is a new generation of AC contactor .1) using ... . 2) all the working process of the power grid without the impact of their loss is very ... voltage range: rated voltage +20% or-20% Power switch (New design )