ZGS11 series prefabricated substation is used in the 12KV net power supply, double or terminal power supply system as substation, distribution, measurement, compensation, controlling and protection devices. The inner of the prefabricated substation has not only the transformer, high-voltage side, but also has 4-position switch cabinet, 2-position switch cabinet, backup protection fuse and plug in fuse. The low-voltage side can be equipped with electrical control, distribution control, compensation device and electricity meter, and applies the transformer oil as the insulation and interrupt media. It is developed on the combination of the most advanced technology and the actual situation. It is the S9 type, and the whole products has the features of small size, easy installation, low noise, low loss, anti-theft, strong overload ability and safety, and therefore it is suitable for the new area, green belts, parks, railway station, docks, hotels, construction sites and airports. The products meet the requirements of its components standard and the GB/T 17467-1998 (high and low voltage prefabricated substation) and the requirements of OZTC.536.009 (technology) and also references to the standard of IEC61130:1995 (prefabricated substation).