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Full Description

Scope

The recommendations presented in this guide apply to the inspection, installation, and maintenance of liquid-immersed power transformers rated 501 kVA and above with secondary voltages of 1000 V and above. This guide covers the entire range of power transformers, including extra high-voltage (EHV) transformers. This guide does not cover special transformers such as furnace transformers, rectifier transformers, etc. Distinctions are made as required for various MVA ratings, voltage ratings, and types of liquid insulation. The manufacturera??s instruction manual should be the primary reference for transformer inspection, installation, and maintenance, especially while the equipment is under warranty. This guide should be used in conjunction to supplement the manufacturera??s instruction manual, or as a substitute when it is not available. Clause 4 contains information for use with transformers rated below 10 MVA with high voltages less than 69 kV. Clause 5 applies to transformers rated 10 MVA and above with high voltages of 69 kV and above, including EHV transformers. For transformers with high voltages that are less than 69 kV and larger than or equal to 10 MVA, users should follow Clause 5.

Abstract

Revision Standard - Active. Guidance on and recommended practices for the installation and maintenance of liquid-immersed power transformers rated 501 kVA and above with secondary voltages of 1000 V and above are provided in this guide. The entire range of power transformers, including extra high-voltage (EHV) transformers are covered in this guide. Special transformers, such as furnace transformers, rectifier transformers, etc., are not covered in this guide. Distinctions are made, as required, for various MVA ratings, voltage ratings, and types of liquid insulation.
 

Document History

  1. IEEE C57.93-2019

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    IEEE Guide for Installation and Maintenance of Liquid-Immersed Power Transformers

    • Most Recent
  2. IEEE C57.93-2007


    IEEE Guide for Installation and Maintenance of Liquid-Immersed Power Transformers

    • Historical Version
  3. IEEE C57.93-1995


    IEEE Guide for Installation of Liquid-Immersed Power Transformers

    • Historical Version