A substation is a part of an electrical generation, transmission, and distribution system. Substations convert voltage from high to low, or vice versa, or perform several other important functions. Between the generating station and the consumer, electrical energy can flow through different substations at different voltage levels. A substation may include a transformer to change the voltage level between the high transmission voltage and the low distribution voltage or at the interconnection of two different transmission voltages. So the above service has been working in our organization GPS DHAKA