JB/T 6758.2-2007 English PDF (JBT6758.2-2007)

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JB/T 6758.2-2007: Continuously transposed conductors. Part 2: Paper-insulated continuously transposed conductors of polyvinyl acetal enamelled copper wires
JB/T 6758.2-2007
JB
MECHANICAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 29.060.01
K 12
Record No.. 20369-2007
Replacing JB/T 6758-1993
Continuously Transposed Conductors –
Part 2. Paper-Insulated Continuous Transposed
Conductors of Polyvinyl Acetal Enamelled Copper Wires
ISSUED ON. MARCH 6, 2007
IMPLEMENTED ON. SEPTEMBER 1, 2007
Issued by. National Development and Reform Commission of PRC
3. No action is required - Full-copy of this standard will be automatically and
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Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions, Code and Product Presentation ... 5
4 Models ... 6
5 Specifications ... 6
6 Technical Requirements, Test Methods and Inspection Rules ... 6
6.1 Size ... 6
6.2 Technical requirements and test methods ... 7
6.3 Inspection rules ... 7
Foreword
JB/T 6758 Continuously Transposed Conductor are totally divided into the following 4
parts.
--- Part 1. General Requirements;
--- Part 2. Paper-Insulated Continuously Transposed Conductors of Polyvinyl Acetal
Enamelled Copper Wires;
--- Part 3. Less Paper Insulated Netting-Typed Continuously Transposed
Conductors of Polyvinyl Acetal Enamelled Copper Wires;
--- Part 4. Heat Resistant Continuously Transposed Conductors of Enamelled
Copper Wires.
This Part belongs to Part 2 of JB/T 6758.
This Part replaced JB/T 6758-1993 Paper-Insulated Continuously Transposed
Conductor of Enamelled Copper Wires.
Compared with JB/T 6758-1993, this part has the major changes as follows.
--- Increase the continuously transposed conductor with self-adhesive property or
semi-hard copper conductor characteristics on the basis of the original product;
--- Supplement partial terminology, code and symbol as per the new product
requirements; which simplify the product model and presentation.
--- Expand the scope of specification; adjust the shape and size factors.
--- Expand the type specifications of insulating paper and other insulating materials.
--- Increase the bond strength of self-adhesive enameled rectangular wire; specify
the non-proportional elongation strength Rp0.2 property requirements.
This Part was proposed by China Machinery Industry Federation.
This Part shall be under the jurisdiction of National Technical Committee for
Standardization of Wire and Cable (SAC/TC 213).
Drafting organizations of this Part. Shanghai Electric Cable Research Institute.
Participating drafting organizations of this Part. Baoding Tianwei Electric Wire Co., Ltd.,
Sichuan Jinrui Electric Engineering Co., Ltd., Shenyang Hongyuan Magnet Wire Co.,
Ltd., Wuxi Huanyu Magnet Wire Co., Ltd., and Hefei ABB Transformer Co., Ltd.
Continuously Transposed Conductors –
Part 2. Paper-Insulated Continuous Transposed
Conductors of Polyvinyl Acetal Enamelled Copper Wires
1 Scope
This Part of JB/T 6758 specifies the general requirements for paper-insulated
continuous transposed conductors of polyvinyl acetal enamelled copper wires. The
enamelled rectangular wire can be Grade-120 polyvinyl acetal enamelled rectangular
copper wire, or self-adhesive polyvinyl acetal enamelled rectangular copper wire
coated with thermosetting epoxy resin on its outside; the copper conductor can be
either conventional soft copper wire, or semi-hard copper wire. This Part shall be used
in conjunction with JB/T 6758.1.
The paper-insulated continuous transposed conductors of polyvinyl acetal enamelled
copper wires are applicable to the winding coils for oil-immersed type transformers or
electrical appliances.
2 Normative References
The provisions in following documents become the provisions of this Part through
reference in this Part of JB/T 6758. For dated references, the subsequent amendments
(excluding corrigendum) or revisions do not apply to this Standard, however, parties
who reach an agreement based on this Standard 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 4074.2 Test Methods for Winding Wires – Part 2. Determination of
Dimensions (GB/T 4074.2-1999, idt IEC 60851-2.1996)
JB/T 6758.1-2007 Continuously Transposed Conductors – Part 1. General
Requirements
3 Terms and Definitions, Code and Product
precision of 1mm to
measure
1.4 Shape size of continuously transposed conductor 6.1 in this Part
5.2.2 in JB/T
6758.1-2007
Continuously transposed
conductor core of enamelled
rectangular wire
T, S
2.1 Transposition pitch 4.2.4 in JB/T 6758.1-2007 5.2.3 in JB/T 6758.1-2007
2.2
The number and shape of
continuously transposed
conductor core
6.1 in this Part; 4.2.1 and 4.2.6 in JB/T
6758.1-2007 Normal vision
3 Lapping
3.1 Lapping mass 4.3.3 in JB/T 6758.1-2007 T, S Normal vision
3.2 Gap width, gap overlap 4.3.6 in JB/T 6758.1-2007 T, S
5.2.4 in JB/T
6758.1-2007 3.3
Overlap lapping, semi-overlap
lapping, overlap width, lapping
pitch
4.3.5 in JB/T 6758.1-2007 T, S
3.4 Lapping direction 4.3.7 in JB/T 6758.1-2007 T, S Normal vision
4 Welding 4.5 in JB/T 6758.1-2007 T, S
Normal vision,
micrometer or steel
ruler with precision
of 0.01mm
5 Withstand DC Voltage Test 4.6 in JB/T 6758.1-2007 T, R 5.3 in JB/T 6758.1-2007
6 Conductor channel test 4.7 in JB/T 6758.1-2007 T, R 5.4 in JB/T 6758.1-2007
7.1 Bonding strength test --- 4.8.1 in JB/T 6758.1-2007 T, S
5.5.1 in JB/T
6758.1-2007
7.2 Bonding bend test --- 4.8.2 in JB/T 6758.1-2007
5.5.2 in JB/T
6758.1-2007
8 Prescribed non-proportional elongation strength Rp0.2 ---
4.1.1 in JB/T
6758.1-2007 --- T, S
5.6 in in JB/T
6758.1-2007
9 Delivery length 4.9 in JB/T 6758.1-2007 T, R 5.7 in JB/T 6758.1-2007
10 Package, label Clause 7 in JB/T 6758.1-2007 T, R Normal vision