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
1Scope
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.
NOTE A 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 1,6oo mm;
– Grade 2: 0,050 mm up to and including 1,6o0 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 lSo maintain registers ofcurrently valid international standards.
IEC 60317-0-1:1990，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 lEC 60317-0-1.
In case of inconsistencies between lEC 60317-0-1 and this standard，IEC 60317-21 shallprevail.
4Dimensions
See clause 4 of lEC 60317-O-1.
5Electrical resistanceSee clause
5 of lEC 60317-O-1.
6Elongation
See clause 6 of lEC 60317-O-1.
7 springiness
See clause 7 of lEC 60317-O-1.
8Flexibility and adherence
See clause 8 of lEC 60317-0-1, where the constant K used for the calculation of the numberof revolutions for the peel test shall be 150 mm.
9Heat shock
See clause 9 of lEC 60317-O-1, where the minimum heat shock temperature shall be 175 °C.
10 Cut-through
No failure shall occur within 2 min at 200c.
11 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.
1 2 Resistance to solvents
See clause 1 2 of IEC 6031 7-0-1 .
1 3 Breakdown voltage
The wire shall meet the requirements given in 1 3.1 and 1 3.2, respectively, when tested at room temperature and at 1 55 °C when this is required by the purchaser.
1 3.1 Nominal conductor diameters up to and including 0,1 00 mm
At least four of the five specimens tested shall not break down at a voltage less than or equal to that given in table 2.
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
