(a) A 6,600 volt 3-phase turbo-alternator has a maximum continuous ra…
Previous year question for Exam.
Question
(a) A 6,600 volt 3-phase turbo-alternator has a maximum continuous rating of 2,000 kw at 0.8 p.f. and its reactance is 12.5%. It is equipped with Merz Price circulating current protection which is set to operate at fault currents, not less than 200 amperes. Find what value of the neutral earthing resistance leaves 10% of the windings unprotected.
(b) Explain the parallel feeder and ring mains protection of feeders.
- Year: 2018