YBM-12/0.4-1250 High and low voltage preinstalled type substation use YBM-12/0.4-1250 High and low voltage preinstalled type substation prefabricated H structure, three independent isolation room are designed within the subsation, separately are high voltage chamber, transformer chamber and low voltage chamber. All distribution equipment are installed in separately isolation room. Each compartment is connected by through cable or rectangular steel generatrix, each compartment has operation and maintain gallery, it is convenient to operate and maintain, applicable to high-rise building in the city and Urban and rural construction, residential area, small and media factory, mine, oil field and Temporary construction electricity and other places. Be used to Accept and distribution cable in distribution system.