Question

Bundled conductors are mainly used in high voltage overhead transmission lines to _______.

• A. reduce transmission line losses.
• B. increase mechanical strength of the line.
• C. reduce corona.
• D. reduce sag

Hint:

Bundled conductors reduce electric field intensity, minimizing corona discharge and noise in EHV lines.

Answer 1

The Correct Option is C

Step 1: Role of bundled conductors
Bundled conductors are used in EHV systems to reduce the electric field intensity at the conductor surface.
Step 2: Effect on corona discharge
Corona loss is directly related to the surface voltage gradient. Bundling increases the effective radius, reducing this gradient and hence corona.