... reasonable design CKX8 series air-insulated bus duct is ideal to be used in the equipment for power transmission and distribution, which ... is charactorized by the huge capacity in transmission, low consumption in wiring, ... voltage: 220V, 380V, 660V2. Rated frequency: 50/60Hz3. Rated current: 100,200,250,400,630,800,1000,1250,1600,2000 ...