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Recent content by Selva_51

  1. Selva_51

    480V ungrounded Delta

    thank you
  2. Selva_51

    480V ungrounded Delta

    There was also scheme proposed like this with a balancing transformer and a neutral-earth link? what are your thoughts on this
  3. Selva_51

    480V ungrounded Delta

    it will be a solidly grounded system to detect earth faults and the 3.7kA is on the 480V side and not on the 13.2kV side. The 13.2 kV side grid is also built by us and we are the only utility in the rural area.
  4. Selva_51

    480V ungrounded Delta

    Thank you for your reply. How is the resistor calculation done and then based on this what will the transformer size if I am to use a zig-Zag transformer. Could you please share a sample calculation if you have it would be really helpful
  5. Selva_51

    480V ungrounded Delta

  6. Selva_51

    480V ungrounded Delta

    Hi All, I have a hybrid power plant with PV, Battery and DG connecting to a 13.2 kV grid via a step-up transformer. the 480V side is delta which is ungrounded, how do I size a grounding transformer? the L-G fault is 3.7kA,
  7. Selva_51

    Earthing Mesh Design

    Hi All, We are in the midst of designing a hybrid power plant with solar PV, BESS and DG with a 15kV substation (with step up transformer and MV switchgear). For this to prepare a earthing mesh design as per IEEE 80 could you please let me know if I create an individual mesh for the substation...
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