Asiatic Electrical & Switchgear Estimation Engineer Interview Questions and Answers

Ferranti effect is the voltage rise at the receiving end of a long transmission line due to capacitive charging current.

• Occurs in long transmission lines (>250 km)

• Voltage at receiving end can be higher than at sending end

• Capacitive charging current causes voltage rise

• Can cause overvoltage and damage to equipment

• Compensators can be used to mitigate the effect

Corona in electrical refers to a phenomenon where a discharge occurs around conductors due to high voltage stress.

• Corona is a luminous discharge that happens when the electric field strength around a conductor exceeds a certain threshold.

• It can occur in high voltage transmission lines, transformers, insulators, and other electrical equipment.

• Corona causes energy losses, audible noise, radio interference, and can lead t...read more