... switch,isolating switch and emergency switch with function of protection in the circuit with hith short circuit ... , 630A, 690V:100A, 200A, 315A, 425A2.5 Kind of usege400V:AC-20B, AC-21B, AC-22B, AC-23B; ... installed: The fuse is conformity with GB13539.1,relation of switch and fusing unit (see table 1)2 ... .7 Withstanding voltage:interphase 12kV,break of each phase 15kV2.8 Rated limiting short current: ...