UNE-EN IEC 60076-11:2021

This part of IEC 60076 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 standard 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 standard may be applicable as a whole or in parts.