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About This Item

 

Full Description

Applies to single-phase and polyphase dry type transformers (including both autotransformers and noncurrent limiting reactors) for supplying energy to power, heating, and lighting circuits.

 

Document History

  1. NEMA ST 20-2021

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    Dry Type Transformers for General Applications

    • Most Recent
  2. NEMA ST 20-2014


    Dry Type Transformers for General Applications

    • Historical Version
  3. NEMA ST 20-1992 (R1997)


    Dry Type Transformers for General Applications

    • Historical Version