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GB/T 33597-2017Continuously transposed conductors (English PDF)

换位导线

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 12, 2017

Implementation date

December 1, 2017

Scope

GB/T 33597-2017 is the English-translated version of 换位导线.

GB/T 33597-2017 covers continuously transposed conductors, made by combining a number of enamelled rectangular copper wires into two columns in broad-face contact, transposing them in the same direction over their narrow faces, and then wrapping or binding them with electrical insulating paper, cord or tape.

It sets the terms and definitions, the code, model and product designation, the technical requirements, the test methods, the inspection rules, and packaging, marking and storage, and it defines the transposition pitch as the axial length between two adjacent transpositions.

It applies to the winding coils of power transformers, reactors and special transformers. Informative annexes describe high-elongation fibre paper, aromatic polyamide paper and a bending stiffness test, and a normative annex gives the test for resistance unbalance. It was issued on 12 May 2017 and has applied since 1 December 2017.

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Document preview — GB/T 33597-2017

National Standard of the People's Republic of China

ICS: 29.060.01
Classification: K 12

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1 Scope
2 normative reference document
3 Terms and definitions
4 code, model and product representation
5 Technical requirements
6 Test Method
7 Inspection rules
8 Packaging, marking and storage
Appendix A (informative) High elongation fiber paper
Appendix B (informative) Aromatic polyamide paper
Appendix C (informative) Test method for bending rigidity of transposition conductors
Appendix D (Normative Appendix) Test Method for Resistance Unbalance between Trays

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This standard specifies the terms and definitions of transposition conductors, codes, models and product representations, technical requirements, test methods, inspection rules, Packaging, marking and storage.

This standard applies to power transformers, reactors and special transformers and other winding coil with transposition wire.

2 Normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this document. For undated references, the latest edition (including all modifications) applies to this document.

GB/T 228.1 Metallic materials - Tensile testing - Part 1: Test methods for room temperature

GB/T 3048.14 Test methods for electrical performance of wire and cable - Part 14: DC voltage test

GB/T 4074.1 Test methods for winding wires - Part 1: General provisions

GB/T 4074.2 Test methods for winding wires - Part 2: Dimensional measurements

GB/T 4074.3 Test methods for winding wires - Part 3: Mechanical properties

GB/T 4074.5 Test methods for winding wires - Part 5: Electrical properties

GB/T 7095.2 enamelled copper flat winding wire - Part 2: 120 grade acetal enamelled copper flat wire

GB/T 7095.3 enamelled round copper wire winding wire - Part 3: 155 - grade polyester enamelled copper flat wire

GB/T 7095.4 enamelled round copper wire winding wire - Part 4: Class 180 polyesterimide enamelled copper flat wire

GB/T 7095.6 enamelled copper flat winding wires - Part 6: Class 200 polyester or polyester imide/polyamide imide composite enamelled copper Flat line

GB/T 7969 Power Cable Paper

GB/T 23310 grade 240 aromatic polyimide film wrapped copper flat wire

JB/T 9554 Polyester fiber nonwovens for electrical

QB/T 4250 500kV Transformer Turn - to - turn Insulation Paper

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Transposition conductor

To a certain number of enameled flat wire combined into a wide range of contact with each other in two columns, according to technical requirements in the two rows of enameled flat wire above and below The narrow surface of the same steering transposition, and electrical insulation paper, rope or belt for continuous winding or bundled winding wire.

3.2 Transposition pitch

The length of an orbital flattened wire after a complete transposition cycle and the number of enameled flat wires Quotient, i.e., the axial length between two adjacent transitions.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

Referenced standards

Normative references

Similar standards

GB/T 8815-2026|GB/T 42740-2023|GB/T 13849-2025|GB/T 22577-2025|GB/T 3048.11-2025|GB/T 3048.13-2025

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