IEC 60317-21 pdf download

IEC 60317-21 pdf download Specifications for particular types of winding wires – Part 21 : Solderable polyurethane enamelled round copper wire overcoated with polyamide, class 1 55
1 Scope
This International Standard specifies the requirements of solderable enamelled round copperwinding wire of class 155 with a dual coating. The underlying coating is based onpolyurethane resin，which may be modified providing it retains the chemical identity of theoriginal resin and meets all specified wire requirements.The superimposed coating is basedon polyamide resin.
NOTEA modified resin is a resin that has undergone a chemical change,or contains one or more additives toenhance certain performance or application characteristics.
Class 155 is a thermal class that requires a minimum temperature index of 155 and a heatshock temperature of at least 175 °c.
The temperature in degrees Celsius corresponding to the temperature index is not necessarilythat at which it is recommended that the wire be operated and this will depend on manyfactors, including the type of equipment involved.
The range of nominal conductor diameters covered by this standard is:- Grade 1: 0,050 mm up to and including 1,6o0 mm;
– Grade 2: 0,050 mm up to and including 1,600 mm.
The nominal conductor diameters are specified in clause 4 of lEC 60317-O-1.
Normative references
The following standard contains provisions which，through reference in this text， constituteprovisions of this International Standard.At the time of publication, the edition indicated wasvalid. All standards are subject to revision，and parties to agreements based on thisInternational Standard are encouraged to investigate the possibility of applying the mostrecent edition of the standard indicated below.Members of lEC and lS0 maintain registers ofcurrently valid international standards.
IEC60317-0-1:1990，Specifications for particular types of winding wires – Part 0: Generalrequirements – 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 7-21 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 1 50 mm.
9 Heat shock
See clause 9 of IEC 6031 7-0-1 , where the minimum heat shock temperature shall be 1 75 °C.
1 0 Cut-through
No failure shall occur within 2 min at 200 °C.
1 1 Resistance to abrasion (nominal conductor diameters from 0,250 mm up to and including 1 ,600 mm)
The wire shall meet the requirements given in table 1 .