The process begins at a power plant where electricity is generated at a relatively low voltage. A step-up transformer immediately increases this voltage to extremely high levels (e.g., 230 kV to 765 kV). This is the key to minimizing energy loss, as higher voltage allows for less current to be used for the same amount of power, significantly reducing the heat lost in the conductors. The high-voltage electricity is then sent across the country via high-voltage transmission lines. When the power reaches a local service area, it enters a substation where step-down transformers reduce the voltage to a level suitable for the local distribution system, which then delivers it to homes and businesses.

At Ningbo Changshi, we provide a full range of high-quality wire cable conductor tension stringing equipment and hydraulic pullers that are indispensable for the construction and maintenance of these essential transmission lines.