Over & under voltage protection device Full-automatic over-voltage/under-voltage protection Max. passing current(A): 20,32,40 EBS1P Over & under ... Voltage Relay is a new generation of household electrical equipment protector, made by our company according to current city power ... 2, Ordering sample To order the EBS1P series over&under protector,rated current is 20A, and quantity is 100 pieces, ...