The classification of voltage levels varies slightly by region and governing body, but a general framework is widely accepted in the power industry.

• High Voltage (HV): Typically refers to voltages in the range of 100 kV to 230 kV. These lines are used for regional power transmission, moving electricity from larger substations to smaller ones that serve cities and large industries.

• Extra-High Voltage (EHV): Encompasses voltages from 345 kV up to 765 kV. EHV lines are the backbone of the power grid, responsible for long-distance, bulk power transfers from major generating stations to regional hubs.

At Ningbo Changshi, we offer a wide array of Overhead Transmission line equipment and tools designed for safe and efficient work across these entire voltage ranges. Our products, such as our tension stringing equipment, are engineered to handle the demanding requirements of both HV and EHV projects.