This part of IEC 317 specifies the requirements of enamelled round copper winding wire of class 240 with a sole coating of aromatic polyimide resin. Class 240 is thermal class that requires a minimum temperature index of 240 and heat shock temperature of at least 260 Degrees celcius.
DS/EN 60317-46:1998 history
1998DS/EN 60317-46:1998 Specification for particular types of winding wires - Part 46: Aromatic polyimide enamelled round copper wire, class 240