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NB/T 10305-2019: (Aluminum alloy wire for pre-twisted fittings for overhead lines)
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(Aluminum alloy wire for pre-twisted fittings for overhead lines)
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NB/T 10305-2019
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Basic data | Standard ID | NB/T 10305-2019 (NB/T10305-2019) | | Description (Translated English) | (Aluminum alloy wire for pre-twisted fittings for overhead lines) | | Sector / Industry | Energy Industry Standard (Recommended) | | Classification of Chinese Standard | K11 | | Classification of International Standard | 29.060.10 | | Word Count Estimation | 9,937 | | Date of Issue | 2019 | | Date of Implementation | 2020-05-01 | | Issuing agency(ies) | National Energy Administration | NB/T 10305-2019: (Aluminum alloy wire for pre-twisted fittings for overhead lines)---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Aluminium alloy wires of preformed helical fittings for overhead lines
ICS 29.060.10
K 11
NB
Energy Industry Standards of the People's Republic of China
Aluminum alloy wire for overhead line pre-twisted fittings
2019-11-04 released
2020-05-01 implementation
Issued by National Energy Administration
Table of contents
Foreword...II
1 Scope...1
2 Normative references...1
3 Terms and definitions...1
4 Representation...2
5 Requirements...2
6 Acceptance rules...4
7 Packaging, labeling, transportation and storage...4
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009 "Guidelines for Standardization Work Part 1.Standard Structure and Compilation".
This standard was proposed by China Electrical Equipment Industry Association.
This standard is under the jurisdiction of the National Bare Wire Standardization Technical Committee (SAC/TC 422).
The main drafting organizations of this standard. Shanghai Cable Research Institute Co., Ltd., Jiangsu Zhongtian Technology Co., Ltd., Jiangdong Hardware Equipment Co., Ltd.
Company, Beijing Palpu Line Equipment Co., Ltd., Shijiazhuang Huaneng Electric Power Fittings Co., Ltd., Shenzhen Tefa Information Optoelectronics Technology Co., Ltd.
Company, Jiangsu Jiekai Power Equipment Co., Ltd., Jiangsu Hengtong Electric Power Special Wire Co., Ltd., Guangdong Yuanguang Cable Industrial Co., Ltd., Shanghai
National Cable Testing Center Co., Ltd., China Southern Power Grid Research Institute Co., Ltd., etc.
The main drafters of this standard. Zheng Qiu, Qin Kai, Miao Xiaolin, Kong Dechun, Cong Peilin, Li Jinkui, Zhang Biao, Lengdangding, Zhu Hongliang, Ding
Zhen Pei, Jiang Lusi, Tang Li, etc.
This standard is issued for the first time.
Aluminum alloy wire for overhead line pre-twisted fittings
1 Scope
This standard specifies the product classification, specifications, performance requirements, test methods, acceptance rules, and acceptance rules of aluminum alloy wires for overhead line pre-twisted fittings.
Signs, labels, packaging, etc.
This standard applies to pre-twisted fittings for overhead lines, such as suspension clamps, strain clamps, protective fittings, and aluminum alloy wires for connecting fittings.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document.
For undated references, the latest version (including all amendments) applies to this document.
GB/T 3048.2 Test methods for electrical properties of wires and cables Part 2.Resistivity test of metallic materials
GB/T 3190-2008 Chemical composition of wrought aluminum and aluminum alloy
GB/T 4909.2 Bare Wire Test Method Part 2.Dimension Measurement
GB/T 4909.3 Test Method for Bare Wire Part 3.Tensile Test
GB/T 4909.7 Test Method for Bare Wire Part 7.Winding Test
GB/T 5075-2016 Terminology for power fittings
GB/T 20975 (all parts) Chemical analysis methods for aluminum and aluminum alloys
3 Terms and definitions
The following terms and definitions defined in GB/T 5075-2016 apply to this document.
3.1
Preformed helical fitting
Wrap the pre-formed spiral strip on the guide (ground) wire, OPGW/OPPC/ADSS optical cable, used to bear mechanical load or (and) electrical
Load of fittings.
[Rewrite the definition 2.1.23 in GB/T 5075-2016]
3.2
Suspension clamp
Hang the guide (ground) wire and OPGW/OPPC/ADSS optical cable to the hanging insulator string (group) or fittings on the fitting string (group).
[Rewrite the definition 2.1.2 in GB/T 5075-2016]
3.3
Tension clamp
Connect the guide (ground) wire and OPGW/OPPC/ADSS optical cable to the tensile string (group) or the fittings on the fitting string (group).
[Rewrite the definition 2.1.3 in GB/T 5075-2016]
3.4
Splicing fitting
It is used to connect or repair the conductive (ground) wire and OPGW/OPPC/ADSS optical cable, and can meet the certain mechanical and electrical properties of the conductive (ground) wire
Hardware that can be requested.
[Rewrite the definition in GB/T 5075-2016 2.1.5]
3.5
Protective fitting
Used to prevent electrical or mechanical performance of wires, ground wires, OPGW/OPPC/ADSS optical cables, various electrical devices or fittings themselves
Protective hardware.
[Rewrite the definition 2.1.7 in GB/T 5075-2016]
4 Representation method
Aluminum alloy wire products for overhead line pre-twisted fittings are indicated by specifications, nominal diameters and the number of this standard. The specifications are represented by the product code and the combination
Gold code composition. As shown below.
Number of this standard;
Nominal diameter
Alloy code, the two chemical components are represented by 1, 2 respectively;
Product code, where LH stands for aluminum alloy and YJ stands for pre-twisted type.
Example. Aluminum alloy wire for overhead line pre-twisted fittings with a nominal diameter of 3.00mm and an alloy code of 1 is expressed as.
5 requirements
5.1 Materials
The material of the aluminum alloy wire should be the aluminum alloy in Table 1, and its chemical composition should meet the requirements of GB/T 3190-2008, see Table 1.
Note. LHYJ1 and LHYJ2 correspond to aluminum alloys of 5056 and 6061 respectively. When only a single data is displayed for the chemical composition specified in the table, except for the given range,
Indicates that the single data is the maximum allowable value.
5.2 Surface quality
The surface of the aluminum alloy wire should be smooth and clean, and there should be no defects that are not commensurate with good industrial products, such as oil stains, corrosion spots, cracks, inclusions,
Scarring, surface indentation or scratches, etc.
5.3 Diameter and diameter deviation
The nominal diameter and diameter deviation of the aluminum alloy wire should meet the requirements of Table 2.
5.4 Tensile strength and elongation
The tensile strength and elongation of the aluminum alloy wire should meet the requirements of Table 3.When measuring elongation, the gauge length of the specimen is 250mm.
5.5 Winding
Take a test piece from the aluminum alloy wire sample, and place it on a mandrel with the same diameter as the aluminum alloy wire at a speed not exceeding 60r/min
The upper is tightly wound 8 times, and the aluminum alloy wire test piece should not break.
5.6 Resistivity
The DC resistivity of the aluminum alloy wire at 20°C should meet the requirements in Table 4.
5.7 Connector
The aluminum alloy wire is allowed to have joints before the final product is drawn. But if all the following conditions are met, the finished aluminum alloy wire is allowed to have joints.
a) The quality of the finished aluminum alloy wire coil (reel) is 100kg and above;
b) There is no more than one joint in the finished aluminum alloy wire coil (reel);
c) The number of coils (reels) of aluminum alloy wire with one joint should not exceed 10% of the total number of coils (reels);
d) When requested by the user, the manufacturer shall provide proof that the tensile strength of the joint is not lower than that specified in Table 3.
For the finished coil (reel) aluminum alloy wire containing a joint, the joint shall be clearly marked and indicated on the certificate.
5.8 Delivery requirements
Aluminum alloy wire can be delivered in coils or coils, and each coil (reel) of aluminum alloy wire should be a whole. According to the negotiation between the two parties, any weight of
Delivery of aluminum alloy wire.
6 Acceptance rules
6.1 Inspection
The aluminum alloy wire should be inspected according to Table 5.Aluminum alloy wire should be inspected by the manufacturer before leaving the factory. Each batch of products should be
The product quality inspection certificate of the manufacturer is attached.
6.2 Sampling
Samples should be taken from aluminum alloy wire products. Each batch of products should be sampled at 1%, no less than 3 rolls (reels), but no more than 10 rolls (reels);
When less than 3 rolls (disks), 100% sampling is used. When the first test result is unqualified, another double number of samples should be taken to test the unqualified items
Carry out the second test, if there are still unqualified, should be checked one by one (reel).
7 Packaging, labeling, transportation and storage
7.1 Packaging
The finished aluminum alloy wire should be neatly arranged, and there should be no disordered loops, and the packaging should be able to prevent external mechanical damage. Per roll (disk)
A certificate of conformity should be attached to the outer packaging of aluminum alloy wire products.
7.2 Identification
Each roll (reel) of aluminum alloy wire products should be attached with a label indicating.
a) The name, trademark and address of the manufacturer;
b) Product name, specification and nominal diameter;
c) Production batch number;
d) Gross weight and net weight (kg);
e) Date of manufacture;
f) Number of this standard;
g) Marking of joints;
h) Pictorial signs for precautions during transportation and storage.
7.3 Transportation
The product should be handled with care when transporting, and it should be protected from moisture and damage during transportation. It is strictly forbidden to install the product and chemically active substances and wet materials in the same vehicle.
In-car transportation.
7.4 Storage
The storage environment of the product should have moisture-proof conditions, and ensure that it should be dry, ventilated, clean, and non-corrosive.
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