ZBW20(JBW)-12 Series Fully-sealed Compact Combined Substation is a kind of independent complete power transmission and distribution equipment, used in 10kV, AC 50Hz network with rated capacity of 50~1600kVA. It is widely used in outdoor power supply fields such as residential zone, factory and mining, hospital, park, oilfield, airport, wharf, railway, and other temporary facilities. The product can be used not only in power supply system for ring network, but also in terminal power supply for radial grid.