This standard specifies the product varieties, technical requirements, test methods and inspection rules for coal shearer cables with rated voltages of 0.66/1.14kV and below. This standard applies to copper core rubber insulated rubber sheathed flexible cables for coal shearers and similar equipment with a rated voltage of 0.66/1.14kV and below. GB 12972.2-1991 Mining rubber sheathed flexible cables Part 2: Coal shearer flexible cables with rated voltage 0.66/1.14 kV and below GB12972.2-1991 Standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
Rubber sheathed flexible cables for mining
Part 2: Coal shearer flexible cables with rated voltage 0.66/1.14kV and below
Flexiblerubber-sheathed cablesforminingpurposesPart 2:Flexible coalcutter cables for ratedvoltagesupto0.66/1.14kv
1 Subject content and scope of application
GB12972.2—91
Replaces GB1170-74
This standard specifies the rated voltage Product varieties, technical requirements, test methods and inspection rules for coal shearer cables 0.66/1.14kV and below.
This standard applies to copper core rubber insulated rubber sheathed flexible cables with a rated voltage U/U of 0.66/1.14kV and below for coal shearers and similar equipment.
This standard should be used together with GB12972.1. 2 Usage characteristics
2.1 Rated voltage U./U are 0.38/0.66kV and 0.66/1.14kV respectively. 2.2 The long-term allowable operating temperature of cable conductors is 65°C. 2.3 The minimum bending radius of the cable is 6 times the cable diameter. 2.4 Yellow-sheathed cables must not be exposed to sunlight for a long time. 3 model
3.1 cable model is shown in Table 1.
Type
No.
UC-0.38/0.66
UCP-0.38/0.66
UCP-0.66/1.14
Name|| tt||Weighing
Coal shearer rubber sheathed flexible cable
Coal shearer shielded rubber sheathed flexible cable
Coal shearer shielded rubber sheathed flexible cable
3.2 cable type Figure 1.
State Bureau of Technical Supervision 1991-06-06 Approval Table 1
Use
Purpose
Power connection for coal shearers and similar equipment with a rated voltage of 0.38/0.66kV Power supply connection for coal shearers and similar equipment with a rated voltage of 0.38/0.66kV Power supply connection for coal shearers and similar equipment with a rated voltage of 0.66/1.14kV 1992-03-01 Implementation
4 specifications
GB 12972.2-91
Figure 1
2
3
5
6
1-power core conductor; 2-ground wire Core conductor; 3—control line core conductor; 4—insulation; 5—insulation shielding; 6—outer sheath cable specifications should comply with Table 2a and Table 2b. Table 2a
Power wire core
Number of cores |Power core
3×16
3×50
3×35
3×50
Ground core
1 ×4
1×6
1×6
1×10
Control core
3×2.5
4×2.5
4×4
7×4
number of cores×nominal cross-section of conductor, mm2
power core
3×35||tt| |3×50
3×70
3×95
5 technical requirements
ground core
1×6
1 ×10
1×16
1×25
Control core
3×6
3×6
3×6
3×10
1.6
1.8
1.8
2.0
Power core
Absolute||tt| |edge
nominal thickness
2.0
2.2
2.2
2.4
5.1 The technical requirements of the cable should comply with Table 3 and Table 4 regulations. 5.2 Conductor
Sheath mark
Weighing thickness
4.5
5.5
5.5
5.5
Table 2b|| tt||Sheath mark
Weighing thickness
6.0
7.0
7.0
7.0
Cable outer diameter
UC-0.38/0.66
minimum
31.3
37.8
41.8
46.0
maximum
35.1| |tt||42.0
46.0
50.9
mm
UCP-0.38/0.66
minimum
34.7||tt| |41.3
45.1
50.0
Cable outer diameter
UCP-0.66/1.14
Minimum value
47.2
54.3
59.6
64.5
max
38.5
45.5
49.3
54.3
mm
Maximum
51.4
58.6
64.3
70.1
GB12972.2-—91
5.2.1 The single wires in the conductor should be tinned, and the surface of the conductor can be covered with an isolation layer. Note: Discoloration or brittleness of the isolation layer after vulcanization will not be assessed. 5.3 Insulation
5.3.1 The insulation of power wire core and control wire core should comply with the XJ-00A regulations in GB7594.2. 5.3.2 If the ground core of UC-0.38/0.66 type cable has an insulating coating, it shall comply with the provisions of XJ-00A in GB7594.2. 5.3.3 The insulation shield adopts the Class A structure in Table 5 of GB12972.1. 5.4 Cable core
5.4.1 The position of the control wire core shall comply with the provisions of Article 7.2b of GB12972.1. 5.4.2 The position of the ground core complies with the provisions of Article 7.4c of GB12972.1. 5.4.3 The twisted pitch diameter ratio of the cable core should not be greater than 10. 5.5 Sheath
5.5.1 If the cable has an inner sheath, the rubber sheath should not be lower than the XH-02A specification in GB7594.6 . 5.5.2 The rubber of the outer sheath should comply with the XH-03A requirements in GB7594.7, but the tear strength should not be less than 7.5N/mm. Table 3
Nominal cross-section of conductor, rm2
16
25
35
Power core 50
70||tt| |95
Control wire core
Test and inspection rules
6
Products are tested according to Table 4.
Serial number
1
1.1
1.2
1.3
1.4
1.5
1.6|| tt||2
2.1bzxz.net
Project name
Structural size
Conductor
Insulation thickness
Shielding
Cable Core
Sheath thickness
Cable outer diameter
Cable performance
Conductor resistance
Table 4
Technical requirements
Insulation resistance at 20C, M·km minimum value
120
120
100
100
80
80||tt| |50
Test type
GB12972.1 Article 4.1 and this standard Article 5.2 GB12972.1 Article 5.2 and this standard Table 2a and Table 2b this standard Article 5.3.3||tt ||GB12972.1 Article 7 and this standard Article 5.4 GB12972.1 Article 8 and this standard Table 2a and Table 2b this standard Table 2a and Table 2b
GB12972.1 Table 1
T,s
T,s
T,s
T,s
T,s
T,s
T, R
Test method
GB4909.2
GB2951.2
Visual inspection
Hinging visual inspection
GB2951.3
GB2951.4
GB3048.4
Serial number||tt ||2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
3
4
Project name
Insulation resistance
Transition resistance
Power frequency AC voltage
Test| |tt||Burning test
Mechanical impact test
Extrusion test
Bending test
Insulation physical machinery
Performance
Sheath Physical machinery
Performance
Identification mark
Delivery length
Table 3 of this standard
GB 12972.2-91
Continued Table 4| |tt||Technical requirements
GB12972.1 Article 11.4
(not applicable to UC-0.38/0.66)
GB12972.1 Table 8
GB12972.1 Article 11.6
16~35mm. 2 times
50~95mm 3 times
UC-0.38/0.66 and UCP-0.38/0.66...30kNUCP-0.66/1.14 .40kN
18000 times conductor continuous
Article 5.3 of this standard
Article 5.5 of this standard
GB12972.1 Article 10
GB12972.1 Article 11.12
Note: St means periodic testing, which should be conducted at least once a year. 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 the Shanghai Cable Research Institute of the Ministry of Mechanical and Electronic Industry. Test type
T,R
T,s
T,R
T,St
T,St
T,St
T.St
T,St
T,St
T,St
R
Test method
GB3048.5
GB12972.1 Appendix D
GB3048.8
GB12666.2
GB12972.1 Appendix A
GB12972.1 Appendix B| | tt | The Institute, Fushun Branch of the General Institute of Coal Science and Technology and other units are responsible for drafting. The main drafters of this standard are Liu Fenglin, Tan Shengmin, and Yang Yan.
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