IEC 60317-7:1997 pdf download

IEC 60317-7:1997 pdf download.Specifications for particular types of winding wires – Part 7: Polyimide enamelled round copper wire, class 220
1 Scope
This International Standard specifies the requirements of enamelled round copper winding wire of class 220 with a sole coating based on polyimide resin. Class 220 is a thermal class that requires a minimum temperature index of 220 and a heat shock temperature of at least 240 °C. 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, inclu- ding the type of equipment involved. The range of nominal conductor diameters covered by this standard is: – Grade 1 : 0,020 mm up to and including 2,000 mm; – Grade 2: 0,020 mm up to and including 5,000 mm. The nominal conductor diameters are specified in clause 4 of IEC 6031 7-0-1 .
2 Normative references
The following standard contains provisions which, through reference in this text, constitute provi- sions of this International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid international stan- dards.
IEC 6031 7-0-1 : 1 990, Specifications for particular types of winding wires – Part 0: General requirements – Section 1 : Enamelled round copper wire.
3 Definitions and general notes on methods of test
For definitions and general notes on methods of test see clause 3 of IEC 6031 7-0-1 .
In case of inconsistencies between IEC 6031 7-0-1 and this standard, IEC 6031 7-7 shall prevail.
4 Dimensions
See clause 4 of IEC 6031 7-0-1 .
5 Electrical resistance
See clause 5 of IEC 6031 7-0-1 .
6 Elongation
See clause 6 of IEC 6031 7-0-1 .
7 Springiness
See clause 7 of IEC 6031 7-0-1 .
8 Flexibility and adherence
See clause 8 of IEC 6031 7-0-1 , where the constant K used for the calculation of the number of revolutions for the peel test shall be 90 mm.
9 Heat shock
See clause 9 of IEC 6031 7-0-1 , where the minimum heat shock temperature shall be 240 °C.
10 Cut-through
No failure shall occur within 2 min at 400 °C.
11 Resistance to abrasion (nominal conductor diameters from 0,250 mm up to and including 2,500 mm)
The wire shall meet the requirements given in table 1 .