Test procedure for thermal endurance of insulating resins and varnishes for impregnation purposes - Electric breakdown methods
Test procedure for thermal endurance of insulating resins and varnishes for impregnation purposes - Electric breakdown methods
IEC 60370:2017 covers methods of test for the determination of thermal endurance (temperature index) of electrical insulating resins and varnishes for impregnation purposes.
It is done by means of impregnating glass cloth and measuring electric strength or breakdown voltage before and after heat ageing.
It covers the materials described in IEC 60455-3-5 and IEC 60464-3-2 and similar materials.
This second edition cancels and replaces the first edition published in 1971. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
Keywords: thermal endurance testing
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