Isolate Switch 1.Type:FN5-12 2.Standard|:IEC420 GB3804 3.Main Material:Procelain& ... switch - fuse current ≥ (1990 version) and GB3804 ≤ 3-63KV AC High Voltage ≥ standard load switch, compared with similar foreign products, technical data ... international level, with small size, light weight, can be used for ring counters and box-Model substation, 10KV lines are widely ...