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Description / Abstract:
Guiding principles are included for the development of test
procedures for
- Thermal evaluation of electrical insulating materials
(EIM)
- Thermal evaluation of electrical insulation systems (EIS)
- Thermal classification 1 of EIS for rating electric
equipment
The principles are presented in the following order:
- Clause 4, General concepts
- Clause 6, Evaluation of the thermal capability of EIM
- Clause 7, Limiting temperatures and their measurement for
EIS
- Clause 8, Thermal evaluation of EIS
In the application of these principles, variations are necessary
to suit the widely different types of equipment and service
conditions that are considered in equipment standards. When
specific equipment, IEEE, or other recognized standards based on
these principles are available, they should take precedence over
this recommended practice.
Purpose
This recommended practice is intended to serve in the
preparation of standards that are principally concerned with the
thermal endurance of EIM and simple combinations thereof, with the
establishment of limiting temperatures of EIS, and with the
provision of general principles for thermal classification of
EIS.