Generator Protection Interview Questions Answers

Why Over Current Protection is not necessary for modern generators?

Over Current protection is not considered necessary for modern alternators because these are capable of withstanding a complete short circuit at their terminals for sufficient time without much over heating and damage.

What type of protection is provided for the generators against over heating of the generator stator?

Resistance temperature detector

Which type of relays are used for the Merz-Price protection system for alternator?

Merz-Price protection is differential protection provided for the alternator. The relays used in the Merz-Price protection system of alternator are instantaneous electro-magnetic type protection.