This guide is applicable to oil-immersed transformers complylng with IEC 76. It indicates how@ within limits@ transformers may be loaded above rated conditions. For furnace transformers@ the manufacturer should be consulted in view of the peculiar loading profile.
1991IEC 60354:1991 Loading guide for oil-immersed power transformers
1970IEC 60354:1972 Loading guide for oil-immersed power transformers
IEC 60354:1991 Loading guide for oil-immersed power transformers was changed to IEC 60076-7:2005 Power transformers - Part 7: Loading guide for oil-immersed power transformers.