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JB/T 6758.1-2007 (JBT 6758.1-2007)

Chinese Standard: 'JB/T 6758.1-2007'
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Standard ID JB/T 6758.1-2007 (JB/T6758.1-2007)
Description (Translated English) Continuously transposed conductors. Part 1: General requirements
Sector / Industry Mechanical & Machinery Industry Standard (Recommended)
Classification of Chinese Standard K12
Classification of International Standard 29.060.01
Word Count Estimation 15,128
Date of Issue 2007-03-06
Date of Implementation 2007-09-01
Quoted Standard GB/T 228; GB/T 3048.14; GB/T 4074.1; GB/T 7095.2; GB/T 7095.3; GB/T 7095.4; GB/T 7095.6; GB 7969; JB/T 9554; QB/T 3521
Drafting Organization Shanghai Electric Cable Research Institute
Administrative Organization National Standardization Technical Committee of wire and cable
Regulation (derived from) NDRC Notice No. 16 of 2007
Summary This standard specifies the CTC model, product structure, technical requirements, inspection rules, and packaging and marking. This part should JB/T 6758 follow-up product standards used in conjunction with the various parts. CTC for a variety of oil-immersed, dry-type transformers, reactors and other electrical windings.

JB/T 6758.1-2007
ICS 29.060.01
K 12
Registration number. 20368-2007
Continuously transposed conductors
- Part 1. General requirements
第 1部分. 一般规定
Issued by. National Development and Reform Commission of PRC
Table of contents
Foreword ... 4 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions, codes and product representations ... 6 
3.1 Terms and definitions ... 6 
3.2 Symbols ... 8 
3.3 Code ... 9 
3.4 Product model ... 10 
3.5 Product expression method ... 12 
4 Technical requirements ... 13 
4.1 Materials ... 13 
4.2 Transposed core structure ... 14 
4.3 Lapping insulation layer ... 16 
4.4 Maximum dimensions of continuously transposed conductors ... 18 
4.5 Welding ... 18 
4.6 DC voltage resistance ... 19 
4.7 Conductor path ... 19 
4.8 Bond strength ... 19 
4.9 Delivery length ... 19 
5 Test methods ... 20 
5.1 General ... 20 
5.2 Dimensional measurements ... 20 
5.3 DC voltage resistance test ... 21 
5.4 Conductor path test ... 21 
5.5 Bond strength test ... 21 
5.6 Test of specified non-proportional extension strength Rp0.2 ... 22 
5.7 Delivery length ... 22 
6 Inspection rules ... 22 
7 Packaging, marking and storage ... 23 
7.1 Packaging ... 23 
7.2 Marking ... 23 
7.3 Storage ... 23 
Appendix A (Informative) High elongation fiber paper ... 25 
Appendix B (Informative) Aromatic polyamide paper ... 26 
Appendix C (Informative) Heat-resistant electrical milk white glue ... 27 
JB/T 6758 “Continuously transposed conductors” is divided into four parts.
- Part 1. General requirements;
- Part 2. Paper-insulated continuously transposed conductors of polyvinyl
acetal enameled copper wires;
- Part 3. Less paper insulated netting-typed continuously transposed
conductors of polyvinyl acetal enameled copper wires;
- Part 4. Heat resistant continuously transposed conductors of enameled
copper wires
This part is part 1 of JB/T 6758.
Appendix A, Appendix B and Appendix C of this part are informative.
This part was proposed by the China Machinery Industry Federation.
This part shall be under the jurisdiction of National Wire and Cable
Standardization Technical Committee (SAC/TC213).
The responsible drafting organization of this part. Shanghai Cable Research
The participating drafting organization of this part. Shanghai Yangxing Copper
Co., Ltd., Tianjin Nexans Electromagnetic Cable Co., Ltd., Baoding Tianwei
Power Wire Co., Ltd., INVEX Insulated Wire Baoying Co., Ltd., Wuxi Huanyu
Electromagnetic Cable Co., Ltd., Sichuan Jinrui Electric Co., Ltd., Shenyang
Hongyuan Electromagnetic Cable Co., Ltd., Hefei ABB Transformer Co., Ltd.
The main drafters of this part. Chen Huimin, Zhang Jingping, Liu Shunrong,
Yuan Weiguo, Kang Jing, Ye Bin, Zhang Xiaobo, Zhao Gongrong, Yang Xuqing,
Feng Feiya, Zheng Wanchang.
This part is released for the first time.
Continuously transposed conductors
- Part 1. General requirements
1 Scope
This part of JB/T 6758 specifies the type, product variety structure, technical
requirements, acceptance rules and packaging marking of the continuously
transposed conductors.
This part shall be used in conjunction with the subsequent product standard
parts of JB/T 6758.
The continuously transposed conductor is applicable to the electrical windings
of a variety of oil-immersed, dry-type transformers, and reactors, etc.
2 Normative references
The provisions in following documents become the provisions of this part
through reference in this part of JB/T 6758. For the dated references, the
subsequent amendments (excluding corrections) or revisions do not apply to
this part; however, parties who reach an agreement based on this part are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB/T 228 Metallic materials - Tensile testing at ambient temperature (GB/T
228-2002, eqv ISO 6892.1998 (E))
GB/T 3048.14 Electric cables and wires - Method for D.C. voltage test (GB/T
3048.14-1992, neq ISO 060. 1 ~ 60.4.1973)
GB/T 4074.1 Test method for winding wires - Part 1. General (GB/T
4074.1-1999. Idt IEC 60851-1.1996)
GB/T 7095.2 Enameled rectangular wires - Part 2. Polyvinyl acetal
enameled rectangular copper wires class 120 (GB/T 7095.2-1995, eqv IEC
GB/T 7095.3 Enameled rectangular wires - Part 3. Polyester enameled
rectangular copper wires with a temperature index of 155 (GB/T
7095.3-1995, eqv IEC 60317-16.1990)
GB/T 7095.4 Enameled rectangular wires - Part 4. Enameled rectangular
copper wires with a temperature index of 180 (GB/T 7095.4-1995, eqv IEC
GB/T 7095.6 Enameled rectangular wires - Part 6. Polyester (imide)
over-coated with polyamide-imide enameled rectangular copper wires, class
200 (GB/T 7095.6-1995, eqv IEC 60317-29.1990)
GB 7969 Electric power cable paper (GB 7969-2003, IEC 60554-3-1.1979,
JB/T 9554 Electrical polyester non-woven fabric
QB/T 3521 500kV transformer coil winding paper
3 Terms and definitions, codes and product
3.1 Terms and definitions
The following terms and definitions apply to this standard.
Continuously transposed conductor
It refers to the winding conductors formed by two rows of a certain number
of enameled copper (aluminum) flat wires mutually contacted at wide
surfaces, transposed in same direction along the narrow surface of the top
and below of the two rows of enameled flat wires, and lapped continuously
by electrical insulated paper, rope or belt.
Transposition pitch
It refers to the axial length of a certain enameled flat wire in the continuously
transposed conductor after subjected to a complete transposition cycle
divided by the number of enameled flat wires of the continuously transposed
conductor, that is,......
Related standard: JB/T 6758.2-2007    JB/T 6758.3-2007