FOREWORD
1. Scope
2. Normative references
3. Terms and definitions
4. Service conditions
5. Tappings
6. Connections
7. Ability to withstand short circuit
8. Rating
9. Rating plate
10. Identification according to cooling
method
11. Temperature-rise limits
12. Insulation levels
13. Climatic, environmental and fire
behavior classes
14. General requirements for tests
15. Measurement of winding resistance
(routine test)
16. Measurement of voltage ratio and
check of phase displacement (routine test)
17. Measurement of short-circuit impedance
and load loss (routine test)
18. Measurement of no-load loss and
current (routine test)
19. Separate-source AC withstand voltage
test (routine test)
20. Induced AC withstand voltage test
(routine test)
21. Lightning impulse test (type test)
22. Partial discharge measurement
(routine and special test)
23. Temperature-rise test (type test)
24. Measurement of sound level
(special test)
25. Short-circuit test (special test)
26. Environmental test (special test)
27. Climatic test (special test)
28. Fire behaviour test (special test)
29. Tolerances
30. Protection against direct contact
31. Degrees of protection provided by
enclosures
32. Earthing terminal
33. Information required with enquiry
and order
Annex A (informative) - Installation and
safety of dry-type transformers
Annex ZA (normative) - Normative references
to international publications with their
corresponding European publications