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Two alternators say 1 & 2 are poised to parallel operation.
But at the time of paralleing alternator 2 gets out of the
system by tripping Earth fault relay. Please send me reply
why this is happening?
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Answer Posted / jyotirmoy das gupta
The answer depends on the following parameters: 1. At which
point the two generating systems are earthed, 2. Is there a
neutral isolation for the second generator, 3. how the
earth fault sensing element is connected- by 3 phase CT
forming residual circuit or direct measurement placing the
CT between generator star point and earth, 4. what is the %
setting for earth fault protection and what delay is
setted.
| Is This Answer Correct ? | 3 Yes | 1 No |
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