Electrical insulation systems - Procedures for thermal evaluation -- Part 31: Applications with a designed life of 5 000 h or less (IEC 61857-31:2017) (english version)
Electrical insulation systems - Procedures for thermal evaluation - Part 21: Specific requirements for general-purpose models - Wire-wound applications— 32 стр.
Electrical insulation systems - Procedures for thermal evaluation - Part 22: Specific requirements for encapsulated-coil model - Wire-wound electrical insulation system (EIS)— 25 стр.
