This standard specifies product models, specifications, materials, technical requirements and inspection rules for copper contact wires used in electric traction. This standard applies to copper 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, copper contact wires should also comply with the requirements of GB 129721.1. GB 12971.2-1991 Contact wire for electric traction Part 2: Copper contact wire GB12971.2-1991 Standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
Quoted contact wires
Electric traction
Part 2: Copper contact wires
Trolley and contact wires for electric tractionPart 2:Copper trolley and contact wires subject content and scope of application
GB12971.291
This standard specifies the product models, specifications, materials, technical requirements and inspection rules of copper contact wires for electric traction. This standard applies to copper 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, copper contact wires should also comply with the requirements of GB12971.1. 2 Model
The model of copper contact wire is shown in Table 1.
Table 1
type
3 specifications
CTY
CT
No.
3.1 round copper contact wire Specifications are shown in Table 2. Nominal cross-section
mm2
50
65
85
100
110
Calculated cross-section||tt| |mm?
50.2
63.6
86.6
100.3
113.1
The specifications of the double-groove copper contact wire are shown in Table 3.
3.2
State Bureau of Technical Supervision 1991-06-06 Approved Table 2
Name
Name
Round Copper Contact Wire
Double groove copper contact wire
nominal diameter and deviation, mm
nominal diameter
8.00
9.00
10.50
11.30
12.00
Deviation
±-.06
±0.06
±0.06
±0.06
±0.06| |tt||Nominal weight
kg/km
447.0
565.5
770.0
891.7
1005.5
1992-03-01 Implementation
Nominal cross-section
mm?
65
85
85(T)
100|| tt||110
150
4 materials
calculated cross section
mm2
65.2
85.4
86.8|| tt||100.1
109.6
150.7
A
(±1%)
9.30
10.80
11.00
11.80
12.34
14.40
B
GB12971.291
Table 3
Dimensions and ||tt| |bias
c
(±2%)
10.19
11.76
11.00
12.81
12.34|| tt||14.40
Figure 1
(±2%)
8.05
8.05
8.50
8.05
8.50
9.75
Difference, mm
D
.+4
2/9
5.70
5.70| |tt||6.12
5.70
6.12
7.27
The copper contact wire should be made of electrical round copper rods that comply with GB3952. 5 Technical requirements
5.1 Dimensions and deviations
5.1.1 The diameter and deviation of circular copper contact wires should comply with the requirements in Table 2. 5.1.2 The size and deviation of the double-groove copper contact wire should comply with the requirements in Table 3. 5.2 Mechanical properties
5.2.1 The mechanical properties of the round copper contact wire should comply with the requirements in Table 4. 5.322.500.60
5.322.500.60
5.70|1.500.38
5.322.500.60
5.702.500.38
6.853.200.38
Figure 2
G
H
Deviation ±2°
35°bzxZ.net
35°
27°
35 °
27°
27°
50°
50°
51°
50°
51°
519
Nominal weight
kg/km
580.0
760.0
771.0
890.0||tt| |974.5
1339.5
Sectional shape
Shape and ruler
inch
Picture 1
Picture 1
Picture 2
Figure 1
Figure 2
Figure 2
Nominal cross-section
mm2
50
65||tt ||85
100
110
Breaking force\
N
not less than
18880
23210| |tt||30480
34500
37600
Note: 1) The gauge length during the test is 250mm. GB12971.2-91
Table 4
Elongation 1
%
not less than
2.2
2.4||tt| |2.6
3.0
3.8
twist
times
not less than
9
9
9
9
9
5.2.2 The mechanical properties of the double-groove copper contact wire should comply with the requirements in Table 5. 5.3 Resistivity
Repeated bending
Bending radius
mm
20
20
20
25||tt ||25
The resistivity of the copper contact wire at 20℃ should not be greater than 0.017682·mm2/m. 5.4 Manufacturing length and joints
number of times
is not less than
8
8
8
8
8|| tt||manufacturing length
m
not less than
1800
1800
1800
1800
1800|| tt||5.4.1 Unless otherwise agreed, the manufacturing length of copper contact wires for electrified railways should comply with the requirements in Table 4 and Table 5. No joints are allowed in the contact wires within the manufacturing length.
5.4.2 Copper contact wires with a nominal cross-section not greater than 110mm 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. Copper contact wires with a nominal cross-section of 150mm2 are allowed to be delivered in short sections with a length of not less than 250m, and their quantity should not exceed 5% of the total delivery weight.
5.4.3. The manufacturing length and short sections of copper contact wires for non-electrified railways shall be determined by agreement between the two parties. The contact wires are allowed to have joints within the manufacturing length. The joints should be carried out before the last drawing, and the number should not be more than 5. The weight of the contact line between the two joints should not be less than 100kg, and the strength of the joint should not be less than 95% of the values ??specified in Table 4 and Table 5. Table 5
nominal cross-section
mm2
50
85
85(T)
100
110
150
Breaking force 1
N| |tt||not less than
24200
29750
30200
34610
37740
51390
Note: 1 ) The gauge length during the test is 250mm. Elongation 1)
%
is not less than
2.5
2.7
2.7
2.9
3.0|| tt||3.3
twist
times
not less than
3
3
3
3||tt ||3
3
repeated bending
bending radius
mm
20
25
25||tt ||25
25
30
number of times
not less than
8
8
8||tt| |8
8
8
manufacturing length
m
not less than
1800
1800||tt| |1800
1800
1800
1000
6 Inspection Rules
Products should be inspected according to Table 6.
Serial number
3
4
5
6
9
Project name
Size and Deviation
Breaking force
, Elongation
Torsion
Repeated bending
Resistivity
Appearance
Manufacturing Length
Joint
GB 12971. 2-91
Table 6
Technical Essentials
Conforms to the provisions of Table 2 and Table 3 of Article 5.1 of this standard Comply with the provisions of Table 4 and Table 5 of Article 5.2 of this standard. The provisions of Table 4 and Table 5 of Article 5.2 of this standard shall comply with the provisions of Table 4 and Table 5 of Article 5.2 of this standard. Article 5.3 of the standard
Conforms to Article 4.2 of GB12971.1
Conforms to Article 5.4 of this standard
Conforms to Article 5.4 of this standard
Test type| |tt||T,R
T,S
T,s
T,S
T,S
T,S||tt ||R
R
R
Test method
GB4909.2
GB4909.3
GB4909.3||tt| |GB4909.4
Appendix A of this standard and
GB4909.5
GB3048.2
Normal visual inspection
Measure with a meter counter|| tt||GB 12971.2—91
Appendix A
Double groove copper contact wire repeated bending test method (supplement)
A1 is in the plane formed by the center line of the contact wire sample , bend the sample according to the bending radius specified in Table A1. First, bend the small arc surface 90° inward, which is called bending 1 time, and then restore it, which is called bending 2 times; then bend it 90° in the opposite direction, which is called bending 3 times; then restore it, which is called bending 4 times, and so on. . When bending, it must be carried out smoothly and slowly. The bending speed should not be more than 30 times per minute. The surface of the bending sample should be attached to the bending fillet surface.
Table A1
Nominal cross-section, mm2
65
85
100
110
150||tt ||Additional Notes:
This standard is proposed by the Ministry of Mechanical and Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of Shanghai Cable Research Institute. Bending radius, mm
20
25
25
25
30
This standard is approved by Shanghai Cable Research Institute and Xiangtan Cable Factory , Shenyang Cable Factory, Tai'an Tram Wire Factory, and Shanghai Cable Factory drafted. The main drafter of this standard is Wang Xueping.
mm
20
25
25
25
30
This standard is sponsored by Shanghai Cable Research Institute, Xiangtan Cable Factory, Shenyang Cable Factory, Tai'an Tram Wire Factory, and Shanghai Cable Factory drafted. The main drafter of this standard is Wang Xueping.
mm
20
25
25
25
30
This standard is sponsored by Shanghai Cable Research Institute, Xiangtan Cable Factory, Shenyang Cable Factory, Tai'an Tram Wire Factory, and Shanghai Cable Factory drafted. The main drafter of this standard is Wang Xueping.
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