Industrial frequency voltage 4KV Insulation voltage 1500V Rated voltage 1140V 1140 V molded case switch NNKK - 1140 type air switch, is suitable for use in ac 50HZ 60HZ, voltage 1140 v, current to 125 a, 200 a, 315 a, 400 a, 600 a, 630 a circuit, the circuit with the isolation and no load cases. Equipped with reliable leading action of the auxiliary contact, be in usually guarantee isolating ...