1.GW4-126 series 2.disconnect switch is three-phase ac 3.50 Hz ac voltage switch equipment Application GW4-126 Type of outdoor ... column type 3-phase ac 50 Hz ac voltage switch equipment, used in outdoor voltage 10 ~ 110 KV power system, have no load ... column type 3-phase ac 50 Hz ac voltage switch equipment, used in outdoor voltage 10 ~ 110 KV power system, have no load ...