Substation Interview Questions Answers

Substation Interview Questions Answers

What are different insulators employed in substations?


Some of the insulators employed in substations are:
Pin insulators
Post insulators
Strain insulators
Suspension insulators
Hallow apparatus insulators
Dead-end insulators
Solid core insulators

What is creepage distance?

Answer: Creepage distance is the shortest distance between two conducting points along the surface of the insulating material.

What is Basic Impulse Level (BIL)?

Answer: Basic Impulse Level (BIL) refer to the peak value of lightning impuse voltage withstand capability of the equipment

What are the disadvantages of corona?

Answer: Some of the disadvantages of corona are:
Corona causes power loss
Corona causes unacceptable noise
Corona cause radio interference