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Autotransformer IEC Vector Group

Autotransformer IEC Vector Group

Autotransformer IEC Vector Group

(OP)
If an autotransformer has wye windings and a common neutral point brought out to a bushing (H0X0), what is the correct vector group name for it?

Is it Yn-yn-0 or is it Y-yn-0?

Thanks

RE: Autotransformer IEC Vector Group

As per IEC 60616-1978 Terminal and tapping marks for Power Transformers, it shall be YN,a0. a for auto connection.

RE: Autotransformer IEC Vector Group

(OP)
Thanks!

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