GB 12971.4-1991 Contact wires for electric traction Part 4: Steel, aluminum and aluminum alloy composite contact wires

This standard specifies the product varieties, specifications, technical requirements and inspection rules for steel, aluminum and aluminum alloy composite contact wires. This standard applies to steel, aluminum and aluminum alloy 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, aluminum and aluminum alloy composite contact wires should also comply with the provisions of CB 12971.1. GB 12971.4-1991 Contact wire for electric traction Part 4: Steel, aluminum and aluminum alloy composite contact wire GB12971.4-1991 Standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
Contact wires for electric traction
Part 4: Trolley and contactwires for electrictracinPart 4: Aluminum-steel and aluminum alloy composite trolley wires1Theme content and Scope of application
GB12971.4-91
This standard specifies the product varieties, specifications, technical requirements and inspection rules for steel, aluminum and aluminum alloy composite contact wires. This standard is applicable to railways, industry and mining, and urban transportation. Steel, aluminum and aluminum alloy composite contact wires used in electrical transportation and lifting systems. In addition to complying with the requirements of this standard, steel, aluminum and aluminum alloy composite contact wires should also comply with the requirements of GB12971.1. 2 Model
Steel, aluminum and aluminum alloy composite contact wire models are shown in Table 1. Table 1
Note: The original model of CGLHI is FGLC.
3 Specifications
3.1 The specifications of steel, aluminum and aluminum alloy composite contact wires are as specified in Table 2. Total nominal
Section
Equivalent copper
Resisting cross section
150||tt| |Steel
Steel, aluminum and aluminum
Alloy logo surface
Aluminum
Aluminum alloy
Table 2
Internal steel single wire, steel, aluminum and aluminum alloy composite contact The wire is covered with steel strands, steel, aluminum and aluminum alloy composite contact wire, nominal
size and deviation, mm
18.0±0.2
116.018.6±0.218.4±0.29.1±0.210.0134.0
116.018.6±0.218 .4±0.29.1±0.2134.0
Approved by the State Bureau of Technical Supervision on 1991-06-06 D
7.3±0.2
Deviation ±2°
50°| |tt||51°
Heaviest
749||tt| |Section
And ruler
Figure 1a
Figure 1b
Figure 2
1992-03 -01 Implementation
Aluminum Alloy
GB12971.4-91
Figure 1
Figure 2
4 Technical Requirements|| tt||4.1 Materials
GB12971.4-91
4.1.1·Aluminum profiles and aluminum alloy profiles for steel, aluminum and aluminum alloy composite contact wires shall comply with the provisions of Appendix A of this standard. 4.1.2 Steel wires used for steel, aluminum and aluminum alloy composite contact lines shall comply with the provisions of Appendix B of this standard. 4.2 Dimensions and deviations bZxz.net
The dimensions and deviations of steel, aluminum and aluminum alloy composite contact wires should comply with the requirements in Table 2. 4.3 Mechanical properties
The mechanical properties of steel, aluminum and aluminum alloy composite contact wires should comply with the requirements in Table 3. The effective gauge length of the comprehensive breaking force sample is 250mm, and the effective gauge length of the bonding force sample is 100mm.
4.4 DC resistance
The DC resistance of steel, aluminum and aluminum alloy composite contact wires should comply with the requirements in Table 3. Table 3
Model specifications
CGLHD195
CGLHD260
CGLHI260
4.5 manufacturing length and joints
Comprehensive breaking force, N|| tt||not less than
29 400
binding force, N
not less than
1960||tt| |2960
4.5.1 The manufacturing length of steel, aluminum and aluminum alloy composite contact wires should not be less than 1800m. DC resistance 20℃, 2/km
is not greater than
4.5.2 Steel core (single wire or Stranded wire) and aluminum alloy are not allowed to have joints. Aluminum joints are allowed, but the distance between the two joints should not be less than 5m, and the mechanical properties of the joints should comply with the requirements in Table 3. 4.5.3 Steel, aluminum and aluminum alloy 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, aluminum and aluminum alloy composite contact wires are allowed to be delivered in any length and short sections. 5 Inspection Rules
Products are inspected according to Table 4.
Table 4
Serial number
Project name
Size and deviation
Comprehensive breaking force
Combining force
DC resistance
Appearance
Manufacturing length
Connector
Technology Key Techniques
Conform to the provisions of Table 2 of Article 4.2 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 Table 3 of Article 4.4 of this standard
Conforms to Article 4.2 of GB12971.1
Conforms to Article 4.5 of this standard
Conforms to Article 4.5 of this standard
Test type
R||tt| |R
Test method
Appendix C of this standard
Normal visual inspection
Measure with meter counter
A1 hot and cold processed aluminum profile
Cold processed aluminum profile:
Hot processed aluminum profile:
GB12971.4—91
Appendix A
Technical Requirements for Aluminum Profiles and Aluminum Alloy Profiles for Steel, Aluminum and Aluminum Alloy Composite Contact Wires (Supplement)
Tensile Strength
Elongation
Tensile strength
Elongation
A2' hot and cold processed aluminum alloy profiles
cold processed aluminum alloy profiles:
hot processed aluminum alloy profiles:
Tensile strength
Elongation
Tensile strength
Elongation
147MPa
127MPa||tt ||21%
A3 The selection of any profile shall comply with the provisions of Article 4 of this standard. Appendix B
Technical requirements for steel single wires and steel strands for steel, aluminum and aluminum alloy composite contact wires (supplement)
B1 steel single wires
Steel single wires should comply with the regulations of GB3083.
B2 steel strand
Steel strand should comply with the regulations of GB1102. The diameter of the single wire is 1.30±0.02mm, and the diameter of the steel strand is 3.90±0.06mm, the breaking force of the steel strand is not less than 12740N. | |tt | Use a saw to cut off the aluminum alloy part at 50mm each (AA in Figure C1), drill holes with an appropriate drill bit along the symmetrical center, and drill out the dovetail part of the steel wire and aluminum alloy. At another place (as shown in Figure C1, BB), use a saw to cut off the upper pure aluminum part, and cut off the steel wire and the aluminum alloy groove part along the steel wire part. Its actual effective test length is 100mm.
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.
Additional notes:
Aluminum
GB12971.4-91
100|| tt | | 200 | | tt | B
This standard was drafted by Shanghai Cable Research Institute, Institute of Metal Chemistry, Railway Science Research Institute, Ministry of Railways, and Tai'an Electric Wire Factory. The main drafter of this standard is Wang Xueping.
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