... vacuum contactors have such advantages as high capabilities of switch-on and switch-off, long electrical and mechanical lifetimes and high ... the bad conditions. The EVS vacuum contactor is used for low voltage DC electromagnetical structure, and can be assembled into 1, 2 ... , rated operating voltage up to 1140V, rated operating current separate into 160A, 250A, 400A and 630A to switch-on or off ...