IEC 61857-32 Ed. 1.0 b:2019

Electrical insulation systems - Procedures for thermal evaluation - Part 32: Multifactor evaluation with increased factors during diagnostic testing

International Electrotechnical Commission , 10/14/2019

Publisher: IEC

File Format: PDF

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IEC 61857-32:2019 series is focused on applications where other possible factors need to be incorporated to evaluate any influence on the performance of the electrical insulation system (EIS). Multi-factor evaluation is the most complex type of project to design and conduct. Clear guidelines are needed to give the user of this document a uniform approach and a method to analyse the test results.

This document is for applications where the stresses are some combination of other factors of influence identified in IEC 60505. The multi-factor stresses are applied during the diagnostic portion of each test cycle.

A few examples of other factors of influence or multi-factor stresses are:
  • high vibration;
  • submersion in oils, water, or solutions;
  • voltage higher than the test voltage of the reference EIS;
  • decreased cold shock temperature.

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