Question 1 a) At the earthing point a heavy impulse current reaching the order of tens of kilo amperes occurs, which is responsible for the known damage of lightning. With aid of illustration, briefly describe the lightning voltage surges and effects in electrical power system. b) A corona discharge is an electrical discharge caused by the ionization of a fluid such as air surounding a conductor carying a high voltage. Explain the differences between cathode and anode corona discharges in terms of mechanism and properties. c) Overhead power lines are always supported on insulators mounted on their support poles/towers. Describe the types and properties of overhead line insulators in the transmission lines.

Question 1 a) At the earthing point a heavy impulse current reaching the order of tens of kilo amperes occurs, which is responsible for the known damage of lightning. With aid of illustration, briefly describe the lightning voltage surges and effects in electrical power system. b) A corona discharge is an electrical discharge caused by the ionization of a fluid such as air surounding a conductor carying a high voltage. Explain the differences between cathode and anode corona discharges in terms of mechanism and properties. c) Overhead power lines are always supported on insulators mounted on their support poles/towers. Describe the types and properties of overhead line insulators in the transmission lines.

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter30: Dc Motors

Section: Chapter Questions

Problem 6RQ: What is CEMF?

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