시리즈 = SENTRON Normal State Configuration = 1NC/1NO Electrical Phase = 1, 3 Maximum Current = 10A The Siemens leading changeover switch is a changeover contacts type hp (14mm) accessory for 3VA1 and 3VA20 up to 3VA25. It belongs to overvoltage category III.It has 6 kV rated impulse withstand voltage