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  1. ilangineer

    Earthing the Neutrals of Y-Y Power Transformers

    Thanks for the quick feedback. The NER at the 11 kV side is to limit the earth fault to 300 A on the 11 kV network. We must use a star/star to avoid any phase displacement, since there is a possibility that other transformers can be swithced in parallel with this one.
  2. ilangineer

    Earthing the Neutrals of Y-Y Power Transformers

    I have the following scenario (in South Africa): a utility power transformer (132/33 kV) is star/delta with an NECRT on the secondary side (limiting to 300 A). I must install a star/star transformer downstream for 33/11 kV supply to a load. What must I do with the two neutral points of my...

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