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IEC 61857-21:1998 ed1.0

Заменен
Electrical insulation systems - Procedures for thermal evaluation - Part 21: Specific requirements for general-purpose model - Wire-wound applications — 19 стр.
This general purpose model (GPM) can be used for the evaluation of wire-wound electrical insulation systems where specific electrotechnical products are not available or required.
ICS
29.080.30 Insulation systems / Изоляционные системы