IEEE 1276 : 1997

1. Overview
1.1 Scope
1.2 Purpose
2. References
3. Definitions
4. Merits of operating at high temperatures
5. Insulation-system temperature ratings, test
     procedures and material-aging qualification
5.1 Insulation-system temperature ratings for 55 deg C
     and 65 deg C rise systems
5.2 Insulation-system temperature ratings for high-
     temperature rise systems
5.3 Hybrid high-temperature insulation systems
5.4 Aging test procedure for material qualification
5.5 Aging test procedure for hybrid high-temperature
     insulation-system qualification
5.6 High-temperature solid and wire insulation and their
     interaction with mineral oil and other high-temperature
     fluids
6. Loading guides for high-temperature transformers
7. Description of high-temperature transformers
7.1 Transformers with hybrid high-temperature insulation
     systems
7.2 Transformers with high-temperature insulation systems
8. Nameplate information
9. Heat run test and average winding temperature
Annex A (normative) Gas analysis
A.1 Dissolved gas-in-oil for transformers insulated
     with high-temperature materials
A.2 Thermal aging of an aramid/cellulose/mineral oil
     hybrid system
A.3 Generation of gas under arcing conditions
Annex B (informative) Bibliography

Gives technical information that is connected to liquid-immersed power transformers that are insulated with high-temperature materials. Given in this guide are guidelines for applying existing qualified high-temperature materials to insulation systems that are suitable for high-temperature liquid-immersed power transformers, recommendations made regarding the loading of high-temperature liquid-immersed power transformers. Also technical information is given for insulation system temperature ratings and test procedures for qualifying new high-temperature materials as they become available.