... working and protecting overload, short circuit and lacking voltage. Fixed or withdrawable, front or rear connection, manual ... Case Circuit BreakerNumber of poles3,4In4025065250Rated insulation voltage (V)Ui800Rated impluse withstand voltage (kV)Uimp8UeAC50/60Hz690DC500Type of Circuit BreakersNHLUltimate ... ,000-5,000 square meters Factory Location:4/F, Unit 3,Delixi Changhong Industry City, Liushi, ...