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Why we are mostly using a single 3-phase transformer
instead of three 1-phase transformers?
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Answer Posted / michael
We use 3 single phase transformer connected in DELTA instead of 1 single phase transformer because of:
1. space consumption
2. higher cost
3. for example 1 transformer in 3 single phase connected in delta fails to operate, still there is 2 transformer running open delta and still there is a supply in other line, rather than if 1 single phase transformer fails.
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