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How to select the rating of a CT used for REF protection.
The rating can be of equal rating of Phase current or
neutral current rating
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Answer Posted / sathya
yes.both ct's must have same rating.
| Is This Answer Correct ? | 4 Yes | 1 No |
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Hi Suppose we have a wye/wye transformer which is grounded at both sides,in this situation, do we have ay ground transformer? in other words, ground transformer can do any thing more (while we have nuetral wire in both sides)? As the last question, what about 3rd harmonic? we have two choices: first using wye/delta transformer + ground transformer and second using wye/wye earthed connection.in the former choice, we dont have 3rd harmoonic at the secondary side but what about Yn/yn conection? do we suffer from 3rd harmonic in the Yn/yn connection?
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