Specifications for particular types of winding wires - Part 31: Glass-fibre wound resin or varnish impregnated, bare or enamelled rectangular copper wire, temperature index 180
This international Standard specifies the requirements of glass-fibre wound resin or varnish impregnated, bare, grade 1 or grade 2 enamelled rectangular copper winding wire, temperature index 180. The impregnating agent can be, for instance polyester or polyesterimide resin based.
NOTE - For this type of wire, the heat shock test is inappropriate and therefore a heat shock temperature cannot be established. Consequently, a class based on the requirements for temperature index and heat shock temperature cannot be specified.
The enamelled wire shall be based on one of the following standards and shall be agreed between purchaser and supplier.
IEC 60317-16:1990, Specifications for particular types of winding wires - Part 16: Polyester enamelled rectangular copper wire, class 155
IEC 60317-28:1990, Specifications for particular types of winding wires - Part 28: Polyesterimide enamelled rectangular copper wire, class 180
IEC 60317-29:1990, Specifications for particular types of winding wires - Part 29: Polyester or polyesterimide overcoated with polyamide-imide enamelled rectangular copper wire, class 200
IEC 60317-30:1990, Specifications for particular types of winding wires - Part 30: Polyimide enamelled rectangular copper wire, class 220
When an enamelled wire is used, it must have a minimum class of 155.
The temperature index of the wire is dependent upon the type of impregnating agent used. The impregnating agent applied to the glass fibre should have a minimum temperature index of 180.
The glass-fibre covering may be:
a) a single layer of glass-fibre;
b) a double layer of glass-fibre, with one layer applied in the direction opposite to that of the other.
The range of nominal conductor dimensions covered by this standard is:
- width: min. 2,0 mm max. 16,0 mm;
- thickness: min. 0,80 mm max. 5,60 mm.
The specified combinations of width and thickness as well as the specified width/thickness ratio are given in IEC 60317-0-4.