The corona effect is a natural phenomenon that occurs in high-voltage transmission lines, particularly at voltages above 200kV. It happens when the electric field around the conductor is strong enough to ionize the surrounding air. This results in an audible hissing sound, a visible blue-violet glow, and a loss of energy.

To mitigate the corona effect, designers often use bundled conductors, where multiple sub-conductors are spaced and used for each phase instead of a single large conductor. This design increases the effective diameter of the conductor, which in turn reduces the electric field intensity at the surface, effectively suppressing corona formation and its associated losses and noise. Our specialized OHTL equipment is designed for the precise and safe installation of these bundled conductors.