IEC 60076-11 Ed. 2.0 b:2018

Current Revision
Power transformers - Part 11: Dry-type transformers

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Power transformers - Part 11: Dry-type transformers

PUBLISH DATE 2018
PAGES 128

Power transformers - Part 11: Dry-type transformers

IEC 60076-11:2018 applies to dry-type power transformers (including auto-transformers) having values of highest voltage for equipment up to and including 72,5 kV and at least one winding operating at greater than 1,1 kV.

This document does not apply to:

  • gas-filled dry-type transformers where the gas is not air;
  • single-phase transformers rated at less than 5 kVA;
  • polyphase transformers rated at less than 15 kVA;
  • instrument transformers;
  • starting transformers;
  • testing transformers;
  • traction transformers mounted on rolling stock;
  • flameproof and mining transformers;
  • welding transformers;
  • voltage regulating transformers;
  • small power transformers in which safety is a special consideration.

Where IEC standards do not exist for the transformers mentioned above or for other special transformers, this document may be applicable as a whole or in parts.

This second edition cancels and replaces the first edition published in 2004 and constitutes a technical revision.

The main changes with regard to the previous edition are as follows:

  • Extension of the scope up to 72,5kV
  • Enclosure management in regards of the performance
  • Management of the dielectric and thermal features with altitude
  • New climatic classes for a better adaptation of customers’ need
  • Establishment of the relation between location and environmental classes
  • For fire behaviour classes, limitation at 1000kVA and process of test more robust
  • Introduction of Seismic class
  • Recommendations for amorphous transformers

Keywords: dry-type transformers

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