IEC 60317-52:2014

IEC 60317-52 ®
Edition 2.0 2014-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specifications for particular types of winding wires –
Part 52: Aromatic polyamide (aramid) tape wrapped round copper wire,
temperature index 220
Spécifications pour types particuliers de fils de bobinage –
Partie 52: Fil de section circulaire en cuivre enveloppé avec un ruban polyamide
aromatique (aramide), d’indice de température 220

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IEC 60317-52 ®
Edition 2.0 2014-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specifications for particular types of winding wires –

Part 52: Aromatic polyamide (aramid) tape wrapped round copper wire,

temperature index 220
Spécifications pour types particuliers de fils de bobinage –

Partie 52: Fil de section circulaire en cuivre enveloppé avec un ruban polyamide

aromatique (aramide), d’indice de température 220

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX Q
ICS 29.060.10 ISBN 978-2-8322-1414-5

– 2 – IEC 60317-52:2014 © IEC 2014
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, general notes and appearance . 7
3.1 Terms and definitions . 7
3.2 General notes . 8
3.2.1 Methods of test . 8
3.2.2 Winding wire . 8
3.3 Appearance . 8
4 Dimensions . 9
4.1 Conductor diameter . 9
4.2 Out of roundness of conductor. 9
4.3 Minimum increase in diameter due to insulation . 9
4.4 Maximum overall diameter . 10
5 Electrical resistance . 10
6 Elongation . 11
7 Springiness . 11
8 Flexibility and adherence . 11
9 Heat shock . 11
10 Cut-through . 11
11 Resistance to abrasion . 11
12 Resistance to solvents . 11
13 Breakdown voltage. 11
14 Continuity of insulation . 11
15 Temperature index . 12
16 Resistance to refrigerants . 12
17 Solderability . 12
18 Heat or solvent bonding . 12
19 Dielectric dissipation factor . 12
20 Resistance to hydrolysis and to transformer oil . 12
21 Loss of mass . 12
23 Pin hole test . 12
30 Packaging . 12
Annex A (informative) Nominal conductor diameters for intermediate sizes (R40) . 14
Annex B (informative) Example of tape wrapped wire . 15
Annex C (informative) Resistance. 16
Bibliography . 17

Figure B.1 – Illustrations of overlap . 15

Table 1 – Conductor diameters . 9
Table 2 – Elongation requirements . 11
Table A.1 – Conductor diameters (R40) . 14
Table C.1 – Nominal resistance . 16

– 4 – IEC 60317-52:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SPECIFICATIONS FOR PARTICULAR
TYPES OF WINDING WIRES –
Part 52: Aromatic polyamide (aramid) tape wrapped
round copper wire, temperature index 220

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60317-52 has been prepared by IEC technical committee 55:
Winding wires.
This second edition cancels and replaces the first edition published in 1999. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– new 3.2.2 containing general notes on winding wire, formerly a part of the scope;
– new 3.3, containing requirements for appearance;
– modification to Clause 15 to delete the note on revisions to IEC 60172;

– new Clause 23, Pin hole test.
The text of this standard is based on the following documents:
CDV Report on voting
55/1395/CDV 55/1457/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The numbering of clauses in this standard is not continuous from Clauses 20 and 30 in order to
reserve space for possible future wire requirements prior to those for wire packaging.
A list of all parts in the IEC 60317, published under the general title Specifications for particular
types of winding wires, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until the
stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to
the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 6 – IEC 60317-52:2014 © IEC 2014
INTRODUCTION
This part of IEC 60317 is one of a series which deals with insulated wires used for windings in
electrical equipment. The series has three groups describing:
1) Winding wires – Test methods (IEC 60851);
2) Specifications for particular types of winding wires (IEC 60317);
3) Packaging of winding wires (IEC 60264).

SPECIFICATIONS FOR PARTICULAR
TYPES OF WINDING WIRES –
Part 52: Aromatic polyamide (aramid) tape wrapped
round copper wire, temperature index 220

1 Scope
This part of IEC 60317 specifies requirements for tape wrapped round copper winding wire of
temperature index 220. The insulation consists of one or more wrappings of aromatic
polyamide (aramid) tape of various thicknesses.
NOTE The heat shock test is inappropriate for this type of wire. 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 range of nominal conductor diameters covered by this standard is:
– 1,600 mm up to and including 5,000 mm;
– the nominal conductor diameters are given in Table 1.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
IEC 60172, Test procedure for the determination of the temperature index of enamelled winding
wires
IEC 60819-3-3:2011, Non-cellulosic papers for electrical purposes – Part 3: Specifications for
individual materials – Sheet 3: Unfilled aramid (aromatic polyamide) papers
IEC 60851 (all parts), Winding wires – Test methods
ISO 3:1973, Preferred numbers – Series of preferred numbers
3 Terms, definitions, general notes and appearance
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
class
thermal performance of a wire expressed by the temperature index and the heat shock
temperature
3.1.2
conductor
bare metal after removal of the insulation

– 8 – IEC 60317-52:2014 © IEC 2014
3.1.3
covering
material which is wound, wrapped or braided around a bare or insulated conductor
3.1.4
insulation
coating or covering on the conductor with the specific function of withstanding voltage
3.1.5
winding wire
wire used for winding a coil to provide a magnetic field
3.1.6
wire
conductor coated or covered with an insulation
3.2 General notes
3.2.1 Methods of test
All methods of test used in this part of IEC 60317 are given in IEC 60851.
The clause numbers used in this standard are identical to the corresponding test numbers in
the IEC 60851 series of standards.
In case of inconsistencies between the publication on methods of test and this standard,
IEC 60317-52 shall prevail.
Where no specific range of nominal conductor diameters is given for a test, the test applies to
all nominal conductor diameters covered by the specification sheet.
Unless otherwise specified, all tests shall be carried out at a temperature from 15 °C to 35 °C
and a relative humidity from 45 % to 75 %. Before measurements are made, the specimens
shall be preconditioned under these atmospheric conditions for a time sufficient to allow the
specimens to reach stability.
The wire to be tested shall be removed from the packaging in such a way that the wire will not
be subjected to tension or unnecessary bends. Before each test, sufficient wire should be
discarded to ensure that any damaged wire is not included in the test specimens.
3.2.2 Winding wire
The temperature in degrees Celsius corresponding to the temperature index is not necessarily
that at which the wire is recommended to be operated and this will depend on many factors,
including the types of equipment involved.
When reference is made to winding wire according to this standard, the following information
should be given:
– reference to IEC 60317-52;
– diameter of the conductor;
– reference should also be made to the number and thickness of the tapes used and to the
degree of overlap, as agreed between the purchaser and supplier.
3.3 Appearance
Before wrapping, the conductor shall be completely free from copper dust and other extraneous
matter.
The tape covering shall be essentially smooth and continuous, wrapped around the conductor
tightly, evenly and free from creases, wrinkles and foreign material when examined with normal
vision, as wound on the original spool or reel.
4 Dimensions
4.1 Conductor diameter
The series of preferred nominal conductor diameters shall correspond to series R20 according
to ISO 3. The actual values and their tolerances are given in Table 1.
The series of intermediate diameters from which the user may select intermediate nominal
conductor diameters, when required for technical reasons, shall correspond to series R40
according to ISO 3. The actual values and their tolerances are given in Annex A.
The conductor diameter shall not differ from the nominal diameter by more than the limits given
in Table 1.
Table 1 – Conductor diameters
Nominal conductor Tolerance Nominal conductor Tolerance
diameter diameter
± ±
mm mm mm mm
1,600 0,016 3,150 0,032
1,800 0,018 3,550 0,036
2,000 0,020 4,000 0,040
2,240 0,022 4,500 0,045
2,500 0,025 5,000 0,050
2,800 0,028
NOTE The dimensions of intermediate nominal conductor diameters for R40 series are given in Annex A.

4.2 Out of roundness of conductor
The difference between the minimum and maximum diameter, at any one point, shall not be
more than the figure given in columns 2 and 4 of Table 1.
4.3 Minimum increase in diameter due to insulation
The minimum increase in diameter due to the insulation shall not be less than the values
calculated using the following formula:
2 Σ T n
i
min. i
where
T is the minimum thickness of the tape in layer number i and n is determined by the
min.i i
degree of overlap in that layer:
– for overlaps of 0 % up to, but not including 50 % n = 1;
– for overlaps of 50 % up to, but not including 66 % n = 2;
– for overlaps of 66 % up to, and including 75 % n = 3.
Minimum thickness shall be calculated from the values given in Table 1 of IEC 60819-3-3:2011
where the permissible deviation of the central thickness value is:

– 10 – IEC 60317-52:2014 © IEC 2014
– for nominal thickness 0,05 mm ± 20 %
– for nominal thicknesses 0,08 mm and greater ± 15 %.
EXAMPLE 1 For a construction using two layers of 0,05 mm tape with 50 % overlap:
T = 0,04 mm, n = 2
min.1 1
T = 0,04 mm, n = 2
min.2 2
Therefore, the minimum increase due to the insulation equals:
2 (0,04 × 2 + 0,04 × 2) mm = 0,320 mm
EXAMPLE 2 For a construction using one layer of 0,05 mm tape with an overlap of 55 % followed by two layers of
0,08 mm tape with no overlap:
T = 0,04 mm, n = 2
min.1 1
T = 0,068 mm, n = 1
min.2 2
T = 0,068 mm, n = 1
min.3 3
Therefore, the minimum increase due to the insulation equals:
2 (0,04 × 2 + 0,068 × 1 + 0,068 × 1) mm = 0,432 mm
As there are many varied constructions of this type of wire, the dimensions due to the
insulation are subject to agreement between purchaser and supplier and shall be clearly stated
in the purchase order.
4.4 Maximum overall diameter
The overall diameter shall not exceed the sum of the maximum conductor diameter given in
Table 1 and the maximum increase in diameter due to the insulation which is calculated using
the formula given below.
One or more tapes may be applied. Combinations of different types, different thickness and
degree of overlap shall be agreed between the purchaser and the supplier.
Where adhesive is used to secure the loose ends of the tape, it shall be compatible with the
insulation system in use.
The formula for calculating the maximum increase due to the insulation is:
2 Σ (n + 1) T
i max.i
where
n is determined by the degree of overlap in accordance with 4.3 in layer number i;
i
T is the maximum paper thickness as calculated in accordance with 4.3 in that layer.
max.i
See the example given in Annex B.
5 Electrical resistance
No resistance values are specified.
The nominal resistance at 20 °C is given in Annex C.

6 Elongation
The elongation at fracture shall be in accordance with the values given in Table 2.
Table 2 – Elongation requirements
Nominal conductor diameter Minimal elongation
mm
Over Up to and including %
– 2,500 30
2,500 5,000 32
7 Springiness
The springback of the wire shall not exceed 5,5°.
8 Flexibility and adherence
The covering shall not expose the conductor nor shall it show any tearing or appreciable
loosening when the wire is wrapped round a mandrel of six times its nominal diameter.
9 Heat shock
Test inappropriate.
10 Cut-through
Test inappropriate.
11 Resistance to abrasion
Test inappropriate.
12 Resistance to solvents
Test inappropriate.
13 Breakdown voltage
At least four out of five specimens shall not break down at a voltage less than or equal to
11,8 kV/mm, based on half the minimum increase in diameter due to the tape.
NOTE The method is described in IEC 60851-5 for round wires of sizes greater than 2,500 mm.
14 Continuity of insulation
Test inappropriate.
– 12 – IEC 60317-52:2014 © IEC 2014
15 Temperature index
The method of test shall be in accordance with IEC 60172. The minimum temperature index
shall be 220.
16 Resistance to refrigerants
Test inappropriate.
17 Solderability
Test inappropriate.
18 Heat or solvent bonding
Test inappropriate.
19 Dielectric dissipation factor
Test inappropriate.
20 Resistance to hydrolysis and to transformer oil
Test inappropriate.
21 Loss of mass
Test inappropriate.
23 Pin hole test
Test inappropriate.
30 Packaging
The kind of packaging may influence certain properties of the wire, for example springiness.
Therefore, the kind of packaging, for example the type of spool, shall be agreed between
purchaser and supplier.
The wire shall be evenly and compactly wound or placed in containers. No spool or container
shall contain more than one length of wire unless agreed between purchaser and supplier.
Marking of the label, when there is more than one length and/or identification of the separate
lengths in the package, shall be agreed between the purchaser and supplier.
Where wires are delivered in coils, the dimensions and the maximum mass of such coils and
any additional protection shall be agreed between purchaser and supplier.
Labels shall be securely attached to the flange of each spool and (where applicable) containers
or coils and shall include the following information:

a) manufacturer's name, trade mark and/or IEC 60317-52;
b) type of wire and insulation;
c) net mass of wire;
d) dimensions of wire;
e) date of manufacture.
...