IEC 61857-21:2009 

Electrical insulation systems - Procedures for thermal evaluation - Part 21: Specific requirements for general-purpose models - Wire-wound applications


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IEC 61857-21:2009 describes a general-purpose model (GPM) and a tall channel alternative model (GPM-TC) which can be used for the evaluation of wire-wound electrical insulation systems (EIS) where specific electrotechnical products are not available or required. The third edition cancels and replaces the second edition published in 2004, and constitutes editorial revisions to make this standard compatible with Parts 1 and 22.

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Additional information

Publication typeInternational Standard
Publication date2009-05-13
Available language(s)English/French, Spanish
TC/SCTC 112 - Evaluation and qualification of electrical insulating materials and systemsrss
ICS29.080.30 - Insulation systems
Stability date  2025
File size1054 KB

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