what happen "when Dyn11 is parallel operation with Dyn1"?
Answers were Sorted based on User's Feedback
Answer / akhilesh singh
Due to 60deg phasor diff., PD of two secondaries will
arise. Therefor a circulating current between these two
secondary flows which causes shortcircuiting.
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / dubai
I agree with murali.
Transformer having -30˚ angle (here DYn 11) can be
paralleled with +30˚ (here DYn 1) angle by reversing the
phase sequence of both primary & secondary terminals of one
of the transformers eliminating phase angle errors.
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / thatharao
Both the terminals will reverse and Phase displacement will
be zero.So phase angle will be zero.
Is This Answer Correct ? | 1 Yes | 0 No |
here phase difference between to secondaries will be 60deg
transformers belonging to dy1 could be operated in parallel
with those of dy11 or viceversa by transposing two of
external high voltage connections of one of the
transformers and also corresponding low voltage external
connections .it is not necessary to change any internal
connections
Is This Answer Correct ? | 9 Yes | 13 No |
Answer / ramniveth and subuhani
same pottential of two neutral cannot be earthed .because
it give rise to third harmonics.so it cannot be paralleled
Is This Answer Correct ? | 7 Yes | 11 No |
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