This standard stipulates the primary-side AC rated voltage 3.6 ~ 40.5kV [1], the maximum capacity of the transformer is 1600kVA, and the working frequency is not more than 50Hz 2], which can be connected to the external acoustic pre-assembler The conditions of use, rated parameters, general structural requirements and test methods of the substation fail. The substation is cabled and can be operated from inside or outside it. The prefabricated substation can be installed on the ground or partly or completely under the ground. As there are no basic generally accepted national standards 3] IEC or ISO standards available for aging or corrosion, this standard does not cover requirements for these aspects 2) 4]