1 Scope
2 Normative references
3 Identification symbols according to cooling
method
4 Temperature-rise limits
4.1 General
4.2 Normal temperature-rise limits at continuous
rated power
4.3 Modified requirements because of unusual
service conditions
4.4 Temperature rise during a specified load cycle
5 Test of temperature rise
5.1 General
5.2 Test methods for temperature-rise determination
5.3 Determination of oil temperatures
5.4 Determination of average winding temperature
5.5 Determination of winding temperature before
shutdown
5.6 Corrections
Annexes
A Note on oil temperature in transformers with forced
oil circulation
B Transient loading - Mathematical model and testing
C Techniques used in temperature-rise testing of oil-
immersed transformers
ZA Normative references to international publications with
their corresponding European publications