Outdoor Package Substation normally designed in compact size applied in indoor and outdoor secondary distribution system. There are many types of the packaged unit substation, but the most widely used type is 11kV packaged unit substation because of the voltage grade advantage. Our substation has the advantages of compact size, flexible combination, easy for transportation. It is widely used in secondary electrical power distribution system. The package unit substation is the combination of transformer, LV switchgear panel and HV switchgear panel. The inside distribution transformer optional for oil filled type and dry type, so it also named compact transformer substation.