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

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
119
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
Shapewww.bzxz.net
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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