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GB 12971.3-1991 Contact wire for electric traction Part 3: Steel and aluminum composite contact wire
Basic Information
Standard ID:
GB 12971.3-1991
Standard Name: Contact wire for electric traction Part 3: Steel and aluminum composite contact wire
Drafting unit:Shanghai Cable Research Institute, Locomotive and Rolling Stock Research Institute of Railway Science Research Institute of Ministry of Railways, Shanghai Cable Factory, Fuxin Cable Factory
Focal point unit:National Technical Committee for Standardization of Wires and Cables
Proposing unit:Ministry of Mechanical and Electronic Industry of the People's Republic of China
Publishing department:State Bureau of Technical Supervision
competent authority:China Electrical Equipment Industry Association
This standard specifies the product varieties, specifications, technical requirements and inspection rules of steel and aluminum composite contact wires. This standard applies to steel and aluminum composite contact wires used in electrical transportation and lifting systems such as railways, industry, mining, and urban transportation. In addition to complying with the requirements of this standard, steel and aluminum composite contact wires should also comply with the requirements of GB 12971.1. GB 12971.3-1991 Contact wire for electric traction Part 3: Steel and aluminum composite contact wire GB12971.3-1991 Standard download and decompression password: www.bzxz.net
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National Standard of the People's Republic of China Contact wires for electric traction Part 3: Steel, aluminum composite contact wires Trolley and contact wires for electric tractionPart 3: Aluminum and steel composite trolley and contact wires1Theme content and Scope of application This standard specifies the product varieties, specifications, technical requirements and inspection rules of steel and aluminum composite contact wires. GB12971.3—91 This standard applies to steel and aluminum composite contact wires used in electrical transportation and lifting systems such as railways, industry, mining, and urban transportation. In addition to complying with the requirements of this standard, steel and aluminum composite contact wires should also comply with the requirements of GB12971.1. 2 Model Steel and aluminum composite contact wire models are shown in Table 1. Table 1 Type No. CGLN OGLW 3 Specifications 3.1 Steel and aluminum composite contact wire Specifications are specified in Table 2. Total nominal Model CGLN CGLW Section mm? 250 195||tt| |215 173 Equivalent copper DC Resisting cross section mm2 120 85||tt ||100 80 steel, aluminum section mm2 steel aluminum 62||tt ||[188 55 140 67148 119Www.bzxZ.net 54 A 18.508||tt| |16.20±838 16.50+8.66 16.70+8.66 State Bureau of Technical Supervision approved Table 2 on 1991-06-06 Dimensions and deviations, mm||tt ||B 18.00±8:28 16.00±8:8 19.60+8:78 13.20+g.52 c| | tt | 9.55±88 9.55±88 8.40±8:8 8.05±8:8 7.30±8:8||tt| |7.30±8:8 5.80±8:28 570±0.40 H Deviation ±2° 27°||tt| |27° 27° 35° 51° 51° 51° 50° Weight kg/km 994 807 965 785 Section Shape and ruler Figure 1 Figure 2a Figure 2b 1992-03-01 implementation GB12971.3-91 Figure 1 Figure 2 4 Technical requirements 4.1 Materials GB12971.3-91 Steel and aluminum composite contact line materials should comply with the following regulations . Steel complies with the provisions of Appendix A of this standard. Aluminum complies with the provisions of Appendix B of this standard. 4.2 Dimensions and deviations The dimensions and deviations of steel and aluminum composite contact lines should comply with the requirements in Table 2. 4.3 Mechanical properties The mechanical properties of steel and aluminum composite contact wires should comply with the requirements in Table 3, in which the effective gauge length of the comprehensive breaking force and torsion test specimen is 250mm. The effective gauge length of the bonding force test specimen is 100mm. The CGLN type contact line torsion project will not be assessed. 4.4 DC resistance The DC resistance of steel and aluminum composite contact wires should comply with the requirements in Table 3. Table 3 Model specifications CGLN250 CGLN195 CGLW215 CGLW173 4.5 manufacturing length and joints Comprehensive pull Breaking force, N not less than 54000 39220 49030 34320 binding force, N not Less than 4.900 3900 2450 1960 DC resistance 20℃, 0/km Not greater than 0.149 0.198 .0.184 0.230 180° repeated twisting (one positive and negative rotation) No cracking|| tt||No cracking 4.5.1 The manufacturing length of CGLN type contact wire should be 1800~3850m. No joints are allowed between aluminum wires and trapezoidal steel wires within the manufacturing length. 4.5.2 The manufacturing length of CGLW type contact wire should not be less than 1000m. Both aluminum and steel wires are allowed to have joints within the manufacturing length. The performance indicators at the joints should comply with the requirements in Table 3. 4.5.3 Steel and aluminum composite contact wires are allowed to be delivered in short sections with a length of not less than 500m, and their quantity should not exceed 5% of the total delivery weight. 4.5.4 According to the agreement between the two parties, steel and aluminum composite contact wires are allowed to be delivered in any manufacturing length and short sections. 5 Inspection Rules Products are inspected according to Table 4. Table 4 Serial number 1 2 3 4 5 6| |tt||7 8 Project name Dimensions and deviations Comprehensive breaking force Combining force Torsion|| tt||DC resistance Appearance Manufacturing length Connector Technical requirements Conforms to the provisions of Table 2 of Article 4.2 of this standard||tt| |Conform to the provisions of Table 3 of Article 4.3 of this standard Conform to the provisions of Table 3 of Article 4.3 of this standard Conform to the provisions of Table 3 of Article 4.3 of this standard Conform to the provisions of Table 3 of Article 4.4 of this standard 3 regulations Conform to the provisions of Article 4.2 of GB12971.1 Conform to the provisions of Article 4.5 of this standard Conform to the provisions of Article 4.5 of this standard Test type||tt| |T,R T,s T,s T,s T,s R R|| tt||R Test method GB4909.2 GB4909.3 Appendix C of this standard GB4909.4 GB499 .4 Normal visual inspection Measurement with meter counter GB12971.3—91 Appendix A Technical requirements for semi-finished steel profiles|| tt||(Supplement) A1 steel profiles shall be made of high weather-resistant structural steel suitable for contact lines. The cross-sectional shape, size and deviation of A2 steel profiles should ensure that steel and aluminum composite contact wire products comply with the relevant provisions of this standard. The mechanical properties of A3 steel profile semi-finished products are: tensile strength should not be less than 540MPa, and elongation should not be less than 5%. Appendix B Technical requirements for aluminum profile semi-finished products (supplement) The application of B1 aluminum profiles complies with the cross-sectional shape and size of B2 aluminum profiles manufactured by "Special No. 1 Aluminum" in GB1196 and deviations should ensure that steel and aluminum composite contact wire products comply with the relevant provisions of this standard. The resistivity of B3 aluminum profiles should not be greater than 0 at 20°C.028264Qmm2/m. The shape of B4 aluminum profiles should be symmetrical, and the surface should be flat and smooth, without cracks, creases, dents, bubbles and deep grooves. The tensile strength of B5 cold-rolled aluminum profiles should not be less than 103MPa, the elongation should not be less than 6%, and the tensile strength of the welding joint should not be less than 90% of the above tensile strength. Appendix C Steel-aluminum composite contact line bonding force test method (supplement) C1CGLN type contact line bonding force test method intercept a 200mm long sample, and place it on A of the sample At the position, use a hacksaw to cut into the aluminum part to completely disconnect it; and take out all the aluminum parts within 5mm as shown in the picture. In the center of the steel bottom at B, use a drill bit of appropriate diameter to drill until the top of the steel part is removed. Then use a flat-bottomed drill of the same diameter to drill flat, and then use a saw to cut off the steel part until it is completely disconnected from the aluminum part along the left and right tangent directions of the drilled hole perpendicular to the axis of the sample. Take out the broken steel part and try The sample is shown in Figure C1. The aluminum composite covering layer at the bottom of the above-mentioned sample is frustrated with a steel plate until the surface of the steel bottom is exposed, and then a tensile test is performed on a tensile testing machine until the steel and aluminum parts begin to produce relative displacement. The tensile force value at this time is The bond between steel and aluminum. C2CGLW contact line bonding force test method: Cut off a 200mm long sample, cut in with a hacksaw at position A of the sample to completely disconnect the aluminum part; and take out all the aluminum parts within 5mm as shown in the figure. At the symmetrical center of the steel section at B, use a drill bit of appropriate diameter to process until the dovetail groove of the steel part is removed. Then use a hacksaw to completely disconnect the steel part along the tangential direction of the drilled hole and perpendicular to the axis of the specimen, and take out the steel part. See Figure C2 for sample preparation. Conduct a tensile test on the above sample on a tensile testing machine until the steel and aluminum parts begin to produce relative displacement. The tensile force value at this time is the bonding force between steel and aluminum. AA AA GB12971.391 200 777777777777777777 100 Figure C1 A 200 Figure C2 B 10.5 (10.0) BB B||tt| | BB | | tt | The main drafters of this standard are Wang Xueping from the Institute of Locomotive and Rolling Stock of the Academy of Sciences, Shanghai Cable Factory, and Fuxin Cable Factory. 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