This standard is applicable to three-phase and single-phase power transformers (including auto-transformers).
Where corresponding standards do not exist for small and special transformers (such as single-phase transformers with rated capacity less than 1kVA and three-phase transformers less than 5kVA, instrument transformers, convertor transformers, traction transformers for electric locomotive, testing transformer and welding transformer), this standard may be referred to.
Foreword I
1. Scope and Service Conditions
2. Informative References
3. Terms
4. Rating
5. Requirements for Transformers with a Tapped Winding
6. Connection and Connection Symbol for Three-phase Transformer
7. Rating plates
8. Other Specifications
9. Tolerance
10. Tests
Appendix A (Supplement) Technical Requirements for Enquiry and Order
Appendix B (Informative) Examples of Specification for Transformers with Tapped Windings
Appendix C (Informative) Specification for Short-circuit Impedance by Boundaries
Appendix D (Informative) Three-phase Transformer Connections
Appendix E (Supplement) Temperature Correction of Load Loss
Additional Explanation
