BS EN 60317-57:2010 Specifications for particular types of winding wires. Polyamide-imide enamelled round copper wire, class 220
BS EN 60317-57 specifies the requirements of an enamelled round copper winding wire of class 220 with a sole coating based on polyamide-imide resin, which may be modified providing it retains the chemical identity of the original resin and meets all specified wire requirements.
Class 220 is a thermal class that requires a minimum temperature index of 220 and a heat shock temperature of at least 240 ºC.
The temperature in degrees Celsius corresponding to the temperature index is not necessarily that at which it is recommended that the wire be operated and this will depend on many factors, including the type of equipment involved.
The range of nominal conductor diameters covered by this standard is as follows:
– Grade 1: 0,071 mm up to and including 1,600 mm;
– Grade 2: 0,071 mm up to and including 1,600 mm.
The nominal conductor diameters are specified in Clause 4 of IEC 60317-0-1.
Contents of BS EN 60317-57:
Introduction
1 Scope
2 Normative references
3 Definitions, general notes on methods of test and appearance
3.1 Definitions and general notes on methods of test
3.2 Appearance
4 Dimensions
5 Electrical resistance
6 Elongation
7 Springiness
8 Flexibility and adherence
9 Heat shock
10 Cut-through
11 Resistance to abrasion
12 Resistance to solvents
13 Breakdown voltage
14 Continuity of insulation
15 Temperature index
16 Resistance to refrigerants
17 Solderability
18 Heat bonding
19 Dielectric dissipation factor
20 Resistance to transformer oil
21 Loss of mass
22 High temperature failure
23 Pin hole test
30 Packaging
Table 1 – Resistance to abrasion