This standard specifies the product classification, inspection rules and packaging markings of contact wires for electric traction. This standard applies to contact wires (commonly known as tram wires) used in electrical transportation and lifting systems such as railways, industry, mining, and urban transportation. This standard must be used together with subsequent parts such as GB 12971.2~12971.5. GB 12971.1-1991 Contact wire for electric traction GB12971.1-1991 Standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
Contact wires for electric traction
Part 1: General provisions
Trolley and contact wires for electric tractionPart 1: General
1Subject content and scope of application||tt ||This standard specifies the product classification, inspection rules and packaging markings of contact wires for electric traction. GB12971.1-91
This standard applies to contact wires (commonly known as tram wires) used in electrical transportation and lifting systems such as railways, industry, mining, and urban transportation. This standard must be used together with subsequent parts such as GB12971.212971.5. 2 Reference standards
GB1102
GB1196
GB2881
round strand wire rope
technical conditions for aluminum ingots for remelting
technical conditions for industrial silicon
GB2900.10
GB3048
GB3083
GB3499
GB3952
GB3954
GB4005
GB4153 | |tt | |tt||Electrician round copper rod
Electrician round aluminum rod
Wire and cable delivery tray
Mixed rare earth metals
Bare wire test method
GB12971 .2
GB12971.3
GB12971.4
GB12971.5
Contact wire for electric traction
Contact wire for electric traction||tt| |Contact wire for electric traction
Contact wire for electric traction
3 code and product representation method
3.1 code
3.1.1 series code
Contact Line
3.1.2 By material
Copper
Copper alloy
C
T
THPbzxZ.net
National Technology Approved by the Supervision Bureau on June 6, 1991 Part 2: Copper Contact Wire
Part 3: Steel, Aluminum Composite Contact Wire
Part 4: Steel, Aluminum and Aluminum Alloy Composite Contact Wire Part 5 Part: Aluminum alloy contact wire
Implemented on 1992-03-01
Steel, aluminum composite
Steel, aluminum and aluminum alloy composite
Aluminum alloy
GL
GLH
LHP)
GB12971.1-91
Note: 1) According to different alloy compositions and characteristics, the code names are THA, THB, 2) According to Different alloy compositions and characteristics are code-named IHA, LHB, and *. For example, heat-treated aluminum-magnesium-silicon rare earth alloy is code-named LHA. 3.1.3 Classified by shape characteristics
Circular
Double groove shape
Y
G (omitted)
3.1.4 Classified by structural characteristics| |tt||Internally covered ladder-shaped steel
Exposed special-shaped steel
Inner-covered steel strand
Inner-covered steel single wire
3.2 Product representation method
N| |tt||W
J
D
3.2.1 Products are represented by model, cross-section and standard number. 3.2.2 Cross-section
The contact wire for electric traction is represented by the nominal cross-section. 3:2.3 Example
The double-groove copper contact wire with a nominal cross-section of 65mm is expressed as: CT65GB12971.2—91
p
The total nominal cross-section is 250mm, enclosed with trapezoidal steel , Steel, aluminum composite contact wire, expressed as: CGLN250GB12971.3-91
The total nominal cross-section is 260mm, containing steel strands, steel, aluminum and aluminum alloy composite contact wire, expressed as: CGLHJ260GB12971.4 —91
Heat-treated aluminum-magnesium-silicon rare earth alloy contact wire with a nominal cross-section of 130mm, expressed as: d.
CLHA130GB12971.5—91
4 Technical requirements
4.1 Nominal dimensions and deviations, mechanical properties, electrical properties, manufacturing lengths and joints are specified in subsequent standards. 4.2 Appearance
4.2.1 The surface of the contact line should be smooth and clean, and there should be no hems, cracks, inclusions and other defects harmful to use. 4.2.2 The contact wires should be neatly and tightly wound on the cable drum, and there should be no kinks or jumpers. 5 Inspection Rules
5.1 Products must be inspected by the quality inspection department of the manufacturer before they can leave the factory. Each batch of products should be accompanied by a product certificate. 5.2 Products are tested according to the provisions of subsequent standards. Type test (T); sampling test (S); routine test (R) are defined according to the provisions of GB4909.1. 5.3 Contact wires of the same model and specifications delivered under the same production conditions are one batch. The sampling test is based on sampling of 3% of each batch, and at least 3 trays are selected. If the first sampling inspection fails, the sampling should be doubled, and the unqualified items should be tested a second time. If they still fail, the trays should be inspected one by one. 6 Rejection
6.1 Any contact wire that does not meet the requirements of this standard shall be rejected. 6.2 In a batch of contact wires delivered, if 30% of the total number of coils are unqualified, the user may reject the batch of contact wire products upon confirmation by both the manufacturer and the user.
7 Packaging and marking
GB12971.1-91
7.1 The contact wire should be wound on a cable drum that complies with the requirements of GB4005 for delivery. The distance between the outermost contact line and the edge of the side plate of the cable tray should be no less than 30mm | The outside of the disk contact wire should be covered with a layer of oil felt or other anti-corrosion materials, and then wrapped with iron sheets or other hard materials. 7.2 Short sections of contact wires are allowed to be packaged in circles and wrapped with linen or other fiber materials. 7.3 If there is an agreement between the two parties, other packaging methods are allowed. 7.4 The cable reel should be marked with arrows to indicate the direction of cable release. 7.5 Each plate or circle of contact wire products should have a solid mark that is easy to find, indicating: a..Manufacturer name;
b.
Model and specifications, mm
c ． Length, m;
d gross and net weight, kg;
e. Factory serial number and date, year, month and day;
f. This standard number.
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. This standard was drafted by Shanghai Cable Research Institute. The main drafter of this standard is Wang Xueping.
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