IEC 60092-303:2023 is applicable to all transformers used for power and lighting and, where appropriate, to static convertors, starting transformers, static balancers, earthing transformers, saturable reactors and transductors for use in ships, including single-phase transformers rated higher than 1 kVA, and three-phase transformers rated higher than 5 kVA, unless special requirements are specified. This document applies to transformers with rated voltage up to and including 36 kV.
This fourth edition cancels and replaces the third edition published in 1980 and Amendment 1:1997. This edition includes the following significant technical changes with respect to the previous edition:
- environmental conditions,
- load harmonic currents,
- Transformers for special applications,
- design and construction,
- transformers for essentials services.