GB/T 4074.3-2008Winding wires -- Test methods -- Part 3: Mechanical properties (English PDF)

Foreword

GB/T 4074-2008 "Winding wires - Test methods" consists of 8 parts.

- Part 1.General;

- Part 2.Determination of dimensions;

- Part 3.Mechanical properties;

- Part 4.Chemical properties;

- Part 5.Electrical properties;

- Part 6.Thermal properties;

- Part 7.Test procedure for the determination of the temperature index of enamelled

winding wires (under consideration);

- Part 8.Test procedure for the determination of the temperature index of enamelled

winding wires - Quick-Test method (under consideration).

This Part is Part 3 of GB/T 4074.

This Part is identical to IEC 60851-3.1997 "Winding wires - Test methods - Part 3.

Mechanical properties", Edition 2.1 (English version), and amendment No. 2 (2003).

For ease of use, the following editorial changes have been made to this Part.

- REPLACE the comma "," used as a decimal point WITH a decimal point ".".

This Part replaces GB/T 4074.3-1999 from the date of implementation.

Compared with GB/T 4074.3-1999, the main changes in this Part are as follows.

- LIMIT the adherence test of tape wrapped round and rectangular wires in 5.5.4 TO

only applicable to adhesive tape wrapped wire products;

- DELETE the requirements for solvent bonding and the corresponding instructions

and NOTE 1 in GB/T 4074.3-1999 in Test method 18;

- MODIFY Figure 10 "Test equipment for bond retention of a helical coil";

- MODIFY suggestive Annex A and suggestive Annex B TO informative Annex A

and informative Annex B.

Annex A and Annex B of this Part are informative annexes.

This Part was proposed by China Electrical Equipment Industry Association.

Winding wires - Test methods - Part 3.Mechanical

properties

1 Scope

This Part of GB/T 4074 specifies the following methods of test.

- Test method 6.Elongation;

- Test method 7.Springiness;

- Test method 8.Flexibility and adherence;

- Test method 11.Resistance to abrasion;

- Test method 18.Heat or solvent bonding.

For definitions, general notes on methods of test and the complete series of methods of

test for winding wires, see GB/T 4074.1.

2 Normative references

The following documents contain the provisions which, through reference in this Part

of GB/T 4074, become the provisions of this Part. For dated references, their subsequent

amendments (excluding corrigendum) or revisions do not apply to this Part. However,

the parties who enter into agreement based on this Part are encouraged to investigate

whether the latest versions of these documents are applicable. For undated reference

documents, the latest versions apply to this Part.

GB/T 4074.1 Winding wires - Test methods - Part 1.General (GB/T 4074.1-2008,

IEC 60851-1.1996, IDT)

GB/T 4074.2-200 Winding wires - Test methods - Part 2.Determination of

dimensions (IEC 60851-2.1997, IDT)

IEC 61033.1991 Test methods for the determination of bond strength of

impregnating agents to an enamelled wire substrate

ISO 178.2001 Plastics - Determination of flexural properties

After peeling and rotating, the specimen shall be examined for loss of adhesion. If the

coating can be removed from the wire without difficulty (for example with the

thumbnail), it shall be considered to have lost its adhesion even if it has not become

completely detached from the wire.

One specimen shall be tested. It shall be reported, if loss of adhesion is observed.