IEC 60317-44:1997+AMD1:2010 CSV

Specifications for particular types of winding wires - Part 44: Aromatic polyimide tape wrapped rectangular copper wire, class 240

This consolidated version consists of the first edition (1997) and its amendment 1 (2010). Therefore, no need to order amendment in addition to this publication.

Spécifications pour types particuliers de fils de bobinage - Partie 44: Fil de section rectangulaire en cuivre recouvert d'un ruban de polyimide aromatique, classe 240

Cette version consolidée comprend la première édition (1997) et son amendement 1 (2010). Il n'est donc pas nécessaire de commander l'amendement avec cette publication.

General Information

• Status: Published
• Publication Date: 07-Jul-2010
• ICS: 29.060.10 - Wires
• ICS: 29.180 - Transformers. Reactors
• Technical Committee: TC 55 - Winding wires
• Current Stage: PPUB - Publication issued
• Start Date: 08-Jul-2010
• Completion Date: 08-Jul-2010

Overview

IEC 60317-44:1997+AMD1:2010 CSV is an international standard published by the International Electrotechnical Commission (IEC) that specifies the requirements for aromatic polyimide tape wrapped rectangular copper winding wire, classified as thermal class 240. This consolidated standard includes the original 1997 edition and its 2010 amendment, providing a comprehensive specification for high-performance insulated winding wire used in electrical equipment.

The aromatic polyimide tape insulation offers excellent thermal endurance and electrical properties, making this standard crucial for manufacturers and engineers designing coils, transformers, and motors subjected to high temperature environments. This winding wire features rectangular copper conductors wrapped with one or two layers of aromatic polyimide tape coated with an adhesive, heat-sealed to ensure robust insulation.

Key Topics

Thermal Class and Performance

• Defined as thermal class 240 with a temperature index of 240°C and minimum heat shock temperature of 260°C.
• Suitable for applications requiring high heat resistance and mechanical durability.

Conductor and Insulation Dimensions

• Nominal conductor width ranges from 2.00 mm to 16.00 mm.
• Thickness ranges from 0.80 mm to 5.60 mm, with specified width-to-thickness ratios outlined in IEC 60317-0-2.
• Insulation increases conductor dimensions according to precise minimum and maximum thresholds ensuring consistency and reliability in performance.

Insulation Material and Adhesion

• Aromatic polyimide tape offers outstanding thermal stability and electrical insulation.
• Tape is coated with adhesives such as fluorinated ethylene propylene (FEP) to guarantee strong adhesion and continuous, durable insulation sheaths.

Mechanical and Electrical Testing

• Requirements cover elongation, springiness, flexibility, adherence, heat shock, cut-through resistance, abrasion, solvent resistance, breakdown voltage, and solderability among others.
• Testing methods are standardized and referenced to IEC 60851 to ensure consistent quality and performance verification.

Packaging and Handling

• The standard also specifies packaging to protect wire quality during transport and storage, ensuring the insulation remains intact without damage or contamination.

Applications

IEC 60317-44 winding wire serves essential roles in manufacturing and servicing electrical equipment subjected to high temperatures and demanding operating conditions, including:

• Electric Motors and Generators - for reliable winding insulation in stators and rotors.
• Transformers and Inductors - ensuring efficient electromagnetic performance and thermal durability.
• High-Temperature Coils - used in aerospace, automotive, and industrial machinery requiring enhanced thermal class insulation.
• Specialized Electrical Equipment - where dimensional precision and robust insulation resistance are critical.

This standard enables manufacturers to produce winding wire that meets internationally accepted safety, quality, and performance criteria to optimize equipment lifespan and reliability.

Related Standards

The implementation of IEC 60317-44 aligns with and complements several other key standards:

• IEC 60317-0-2 – General specifications for enamelled rectangular copper wires, including dimensions and tolerances.
• IEC 60851 – Methods of test for winding wires, detailing procedures for measuring electrical, mechanical, and thermal properties.
• IEC 60264 – Packaging of winding wires to ensure preservation of insulation integrity during distribution.
• ISO 3 – Preferred numbers standard, ensuring consistency in conductor dimension selection.

Manufacturers and engineers should be familiar with these referenced standards to ensure full compliance and to leverage best practices in wire design, testing, and application.

---

By adhering to IEC 60317-44, electrical engineers and component manufacturers ensure high-quality aromatic polyimide tape wrapped rectangular copper wire suitable for high-temperature winding applications. This promotes enhanced electrical insulation durability, safety, and performance optimization across a broad spectrum of industrial and commercial electrical equipment.

Standards Content (Sample)

IEC 60317-44 ®
Edition 1.1 2010-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Specifications for particular types of winding wires –
Part 44: Aromatic polyimide tape wrapped rectangular copper wire, class 240

Spécifications pour types particuliers de fils de bobinage –
Partie 44: Fil de section rectangulaire en cuivre recouvert d'un ruban de
polyimide aromatique, classe 240

IEC 60317-44:1997+A1:2010
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IEC 60317-44 ®
Edition 1.1 2010-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Specifications for particular types of winding wires –
Part 44: Aromatic polyimide tape wrapped rectangular copper wire, class 240

Spécifications pour types particuliers de fils de bobinage –
Partie 44: Fil de section rectangulaire en cuivre recouvert d'un ruban de
polyimide aromatique, classe 240
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CC
CODE PRIX
ICS 29.060.10 ISBN 978-2-88910-961-6
– 2 – 60317-44 © IEC:1997+A1:2010
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references.6
3 Definitions and general notes on methods of test .7
4 Dimensions.8
5 Electrical resistance.9
6 Elongation .9
7 Springiness.10
8 Flexibility and adherence .10
9 Heat shock .10
10 Cut-through .10
11 Resistance to abrasion .10
12 Resistance to solvents .10
13 Breakdown voltage .10
14 Continuity of insulation.11
15 Temperature index.11
16 Resistance to refrigerants .11
17 Solderability.11
18 Heat or solvent bonding .11
19 Dielectric dissipation factor .11
20 Resistance to transformer oil .11
21 Loss of mass .12
23 Pin hole test .12
30 Packaging.12

Table 1 – Minimum increases due to the insulation .8
Table 2 – Maximum increases due to the insulation .9
Table 3 – Elongation requirements .9
Table 4 – Breakdown voltage .11

60317-44 © IEC:1997+A1:2010 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SPECIFICATIONS FOR PARTICULAR TYPES OF WINDING WIRES –

Part 44: Aromatic polyimide tape wrapped
rectangular copper wire, class 240

FOREWORD
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

This consolidated version of IEC 60317-44 consists of the first edition (1997) [documents
55/541/FDIS and 55/571/RVD] and its amendment 1 (2010) [documents 55/1182/FDIS and
55/1193/RVD]. It bears the edition number 1.1.
The technical content is therefore identical to the base edition and its amendment and
has been prepared for user convenience. A vertical line in the margin shows where the
base publication has been modified by amendment 1. Additions and deletions are
displayed in red, with deletions being struck through.

– 4 – 60317-44 © IEC:1997+A1:2010

International Standard IEC 60317-44 has been prepared by IEC technical committee 55:
Winding wires.
The committee has decided that the contents of the base publication and its amendments 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.
IMPORTANT – The “colour inside” logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this publication using a colour printer.

60317-44 © IEC:1997+A1:2010 – 5 –
INTRODUCTION
This part of IEC 60317 forms an element of a series of standards which deals with insulated
wires used for windings in electrical equipment. The series has three groups describing:
1) methods of test (IEC 60851);
2) specifications (IEC 60317);
3) packaging (IEC 60264).
– 6 – 60317-44 © IEC:1997+A1:2010
SPECIFICATIONS FOR PARTICULAR TYPES OF WINDING WIRES –

Part 44: Aromatic polyimide tape wrapped
rectangular copper wire, class 240

1 Scope
This part of IEC 60317 specifies the requirements of tape wrapped rectangular copper winding
wire of class 240. The insulation consists of one or two wrappings of aromatic polyimide tape.
Class 240 is a thermal class that requires a temperature index of 240 and a heat shock
temperature of at least 260 °C.
NOTE In some countries, e.g. Canada, Russia, USA, this product is assigned a class 220.
The tape is coated on one or both sides with a suitable adhesive, for instance, fluorinated
ethylene propylene. After wrapping, the tape is heat-sealed to form a continuous and adherent
sheath.
Specific requirements may be subject to contract.
The temperature in degrees Celsius corresponding to the temperature index is not necessarily
that at which the wire is recommended to be used and this will depend on many factors,
including the types of equipment involved.
The range of nominal conductor dimensions covered by this standard is:
– width: min. 2,00 mm, max. 16,00 mm;
– thickness: min. 0,80 mm, max. 5,60 mm.
The specified combinations of width and thickness as well as the specified ratio
width/thickness are given in IEC 60317-0-2.
When a reference is made to winding wire according to this standard, the following information
should be given:
– reference to IEC 60317-44;
– dimension of the nominal conductor (width x thickness);
– grade.
Example: 60317-44 IEC 4,00 mm x 1,00 mm grade A2
2 Normative references
The following referenced documents are indispensable for the application of this document. For
dated references, only the edition cited applies. For undated references, the latest edition of
the referenced document (including any amendments) applies.
IEC 60172: 1987, Test procedure for the determination of the temperature index of enamelled
winding wires
IEC 60317-0-2:1990, Specifications for particular types of winding wires – Part 0: General
requirements – Section 2: Enamelled rectangular copper wire

60317-44 © IEC:1997+A1:2010 – 7 –
IEC 60851, Methods of test for winding wires
ISO 3:1973, Preferred numbers – Series of preferred numbers
3 Definitions and general notes on methods of test
3.1 Terms and definitions
For the purpose of this part of IEC 60317, the following definitions apply.
3.1.1
class
the thermal performance of a wire expressed by the temperature index and the heat shock
temperature
3.1.2
conductor
the bare metal after removal of the insulation
3.1.3
covering
a material which is wound, wrapped or braided around a bare or insulated conductor
3.1.4
crack
an opening in the insulation which exposes the conductor to view at the stated magnification
3.1.5
grade
a range of thickness of the insulation of a wire
3.1.6
insulation
a coating or covering on the conductor with the specific function of withstanding voltage
3.1.7
nominal conductor dimension
the designation of the conductor size in accordance with IEC 60317
3.1.8
winding wire
a wire used for winding a coil to provide a magnetic field
3.1.9
wire
a conductor coated or covered with an insulation
3.2 General notes on 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 with the respective test numbers of
IEC 60851.
In case of inconsistencies between IEC 60851 on methods of test and this part of IEC 60317,
the latter shall prevail.
– 8 – 60317-44 © IEC:1997+A1:2010
Where no specific range of nominal conductor dimensions is given for a test, the test applies to
all nominal conductor dimensions 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.
4 Dimensions
The dimensions due to the insulation depend upon an agreement between purchaser and
supplier. The dimensions in this standard shall be used as a guide in forming that agreement.
4.1 Conductor dimensions
See 4.1 of IEC 60317-0-2.
4.2 Tolerance on conductor dimensions
See 4.2 of IEC 60317-0-2.
4.3 Rounding of corners
See 4.3 of IEC 60317-0-2.
4.4 Increase in dimensions due to the insulation
The minimum increase in width or thickness due to the insulation shall be as given in table 1.
Table 1 – Minimum increases due to the insulation
Single tape Double tape
Minimum increase in dimensions Minimum increase in dimensions
due to the insulation due to the insulation
Grade Grade
mm mm
A1 0,100 B1 0,200
A2 0,130 B2 0,260
A3 0,170 B3 0,340
A4 0,210 B4 0,430
A5 0,260 B5 0,510
4.5 Maximum overall dimensions
The overall dimensions shall not exceed the sum of the maximum conductor dimensions given
in 4.2 and the maximum increase in dimensions due to the insulation given in table 2.
Before wrapping, the conductor shall be completely free from copper dust and other extraneous
matter.
60317-44 © IEC:1997+A1:2010 – 9 –
One or two tapes may be applied with a degree of overlapping agreed upon between purchaser
and supplier.
The tape shall be wrapped on the conductor, tightly, evenly and free from creases or wrinkles,
with the adhesive on the inside.
After wrapping, the tape shall be heat-sealed by suitable means to form an adherent and
continuous sheath.
Table 2 – Maximum increases due to the insulation
Single tape Double tape
Maximum increase in dimensions Maximum increase in dimensions
due to the insulation due to the insulation
Grade Grade
mm mm
A1 0,140 B1 0,280
A2 0,180 B2 0,360
A3 0,240 B3 0,480
A4 0,300 B4 0,600
A5 0,340 B5 0,680
Example: The maximum overall dimensions of a wire with a nominal conductor width of
4,000 mm and a conductor thickness of 1,000 mm, insulated with a single tape to grade A.3
(including adhesive) are:
for the width: 4,050 mm + 0,240 mm = 4,290 mm; and
for the thickness: 1,030 mm + 0,240 mm = 1,270 mm.
5 Electrical resistance
The resistance of the wire shall be expressed as the d.c. resistance at 20 °C. The method used
shall provide an accuracy of 0,5 %.
The maximum value of resistance shall be not greater than the value calculated for the
minimum tolerated cross-sectional area of the conductor resulting from the minimum
dimensions in thickness and width and the maximum for the corner radius, with a resistivity of
2 –1
1/58 Ω mm m .
One measurement shall be made.
6 Elongation
The elongation at fracture shall be in accordance with the values given in table 3. Test
inappropriate.
Table 3 – Elongation requirements
Nominal thickness of the conductor
Minimum elongation
mm
Over Up to and including %
– 2,500 30
2,500 5,600 33
– 10 – 60317-44 © IEC:1997+A1:2010
7 Springiness
The wire shall not exceed the maximum springback of 5,5°.
8 Flexibility and adherence
8.1 Mandrel winding test
The covering shall show no crack or delamination after the wire has been bent flatwise and
edgewise on a mandrel with a diameter four times the width and thickness, respectively.
8.2 Adherence test
The wire shall be stretched by 15 % for a single taped wire or by 10 % for a double taped wire.
The distance of loss of adhesion shall be less than one times the conductor width.
9 Heat shock
The wire shall be stretched by 15 % for a single taped wire or by 10 % for a double taped wire.
The covering shall show no crack.
The minimum heat shock temperature shall be 260 °C.
10 Cut-through
When using a nominal round conductor diameter of 1,600 mm, no failure shall occur within
2 min at 450 °C.
11 Resistance to abrasion
Test inappropriate.
12 Resistance to solvents
Test inappropriate.
13 Breakdown voltage
At least four of the five specimens tested shall not break down at a voltage less than or equal
to that given in table 4.
60317-44 © IEC:1997+A1:2010 – 11 –
Table 4 – Breakdown voltage
Nominal conductor thickness Minimum breakdown voltage (r.m.s.)
mm Single tape Double tape
Up to and
Voltage Voltage
Over Grade Grade
including V V
A1 1 500 B1 2 500
A2 2 000 B2 3 000
1,600 5,600 A3 2 300 B3 3 500
A4 2 600 B4 4 200
A5 3 000 B5 5 000
14 Continuity of insulation
The method of test and requirement may be agreed upon between purchaser and supplier.
15 Temperature index
The test shall be carried out in accordance with IEC 60172 on specimens made from aromatic
polyimide tape wrapped round wir
...