By converting the electric power system voltage, the received

Power systems, power plants will be a natural primary energy into electrical energy, electricity users to the distant power transmission, power transmission lines in order to reduce losses and line impedance voltage drop, the voltage needs to be increased;  air circuit breaker  users in order to meet safety needs, but also lowers the voltage, and assigned to each user, which can increase and reduce the voltage required, and distribution of electric energy to the substation. So  electric meter  power system voltage through its transformation, acceptance and distribution of electric energy electrical device, which is linked power plants and power users of the intermediate links, through the voltage level of the substation will be linked to the grid, substations the role of the voltage conversion, transmission and distribution of electric energy. By the power transformer substation, power distribution equipment, secondary systems and the necessary ancillary equipment components.