... switch,rated insulating voltage AC800V.rated operating voltaged 690V. 400V,rated frequency 50HZ. the rates current 160A~630A mainly used as power switch ... , isolating switch and emergency switch with function of protection in the circuit with high ... for 250A, NT2 for 400A and NT3 for 630ARated currents: 4, 6, 10, 16, 20, 25, 32, 35, 40, 50, 63 ...