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New IEEE Standard - Superseded. Recommendations believed essential for the application of overcurrent protective devices applied to limit the exposure time of transformers to short circuit current are set forth. Transformer coordination curves are presented for four categories of transformers. There is no intent to imply overload capability.
 

Document History

  1. IEEE C57.109-2018


    IEEE Guide for Liquid-Immersed Transformers Through-Fault-Current Duration

    • Most Recent
  2. IEEE C57.109-1993


    IEEE Guide for Liquid-Immersed Transformers Through-Fault-Current Duration

    • Historical Version
  3. IEEE C57.109-1985

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    IEEE Guide for Transformer Through-Fault-Current Duration

    • Historical Version