Why are bundled conductors used in high-voltage 3-phase transmission lines?

2025-08-11
Bundled conductors, which consist of two or more sub-conductors per phase, are primarily used in Extra-High Voltage (EHV) transmission lines to address a phenomenon called the corona effect. By splitting a single conductor into a bundle, the electric field gradient around the conductors is reduced, which significantly decreases energy loss and radio interference caused by corona discharge. Additionally, bundling increases the line's surge impedance loading (SIL), which allows for greater power transfer capacity. This practice is essential for building robust and efficient transmission infrastructure. Ningbo Changshi provides a full range of equipment for stringing bundled conductors, including OHTLstringingequipment.com/Hydraulic-Conductor-Tensioners.html target='_blank'>Tensioners, pullers, and conductor carts.
Get the latest price? We'll respond as soon as possible(within 12 hours)
For a better browsing experience, we recommend that you use Chrome, Firefox, Safari and Edge browsers.