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Describes test procedures for evaluation of multifactor endurance of insulation systems in those cases where both thermal and electrical ageing factors are significant. The procedures are intended for insulation systems used, or proposed to be used, in a.c. electrical machines using form-wound windings up to and including 50 MVA and 15 kV. The evaluation described herein does not include stress grading.
|Engelse titel||Rotating electrical machines - Part 18: Functional evaluation of insulation systems - Section 33: Test procedures for form-wound windings - Multifactor functional evaluation - Endurance under thermal and electrical stresses of insulation systems used in machines up to and including 50 MVA and 15 kV|