This standard specifies product varieties, technical requirements, test methods and inspection rules for shielded rubber sheathed flexible cables with rated voltage 3.6/6kV. This standard applies to ground mobile mining machinery and equipment rated voltage 3.6/6kV copper core rubber insulated rubber sheathed flexible cables. This standard should be used together with GB 12972.1. GB 12972.7-1991 Mining rubber sheathed flexible cables Part 7: Rated voltage 3.6/6 kV shielded rubber sheathed flexible cables GB12972.7-1991 Standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
Mining rubber-sheathed flexible cables
Part 7: Rated voltage 3.6/6kV
Shielded rubber-sheathed flexible cables
Flexible rubber-sheathed cables for mining purposesPart 7: Flexible cables with screens forrated voltage of 3. 6/6 kV
1 Subject content and scope of application
GB 12972.7—91
replaces GB117074
This standard specifies product varieties, technical requirements, test methods and inspection rules for rated voltage 3.6/6kV shielded rubber sheathed flexible cables. This standard is applicable to ground mobile mining machinery and equipment rated voltage 3.6/6kV copper core rubber insulated rubber sheathed flexible cables. This standard should be used together with GB12972.1. 2Usage characteristics
2.1 Rated voltage U/U is 3.6/6kV.
2.2 The long-term allowable operating temperature of the cable conductor is 90°C. 2.3 The minimum bending radius of the cable is 6 times the cable diameter. 2.4 The ground core of the cable must be well grounded. 3 model
3.1 cable model is shown in Table 1.
Table 1
Type
No.
UYP-3.6/6
UYPT-3.6/6
UYPD-3.6/6| |tt||UYPTD-3.6/6
Name
Mobile shielded rubber sheathed flexible cable for mining
Mobile metal shielded rubber sheathed flexible cable for mining
Mobile for mining Shielded rubber sheathed flexible cable
Mobile metal shielded rubber sheathed flexible cable for mining
3.2 cable type as shown in Figure 1.
The State Bureau of Technical Supervision approved the use of
TU
rated voltage 3.6/6kV mobile ground mining machinery power connection on 1991-06-06. The lower limit of ambient temperature is 20℃
The rated voltage is 3.6/6kV mobile ground mining machinery power supply connection. The lower limit of ambient temperature is -40℃
1992-03-01 implementation
4 specifications
GB12972.7-91
S
UYP-3.6/ 6
UYPD-3.6/6
Figure 1
UYPT-3.6/6
UYPTD-3.6/6
1 One power core conductor and Shield; 2-insulation; 3-metal shield (also used as ground wire); 4-semi-conductive rubber filling; 5-semi-conductive shield 6-ground core conductor; 7 semi-conductive cladding; 8-sheathed cable specifications should comply with Table 2a and Table 2b provide. Table 2a
Number of cores × nominal conductor cross-section, mm2
Power wire core
3×16
3×25
3×35|| tt||3×50
ground core
1×16
1×16
1x16
1×25
core number tt||Ground core
3×16/3
3×16/3
3×16/3
3×25/3||tt| |Power core
Insulation
Nominal thickness
4.0
4.0
4.0
4.0
Power core
Absolute
Edge
Nominal thickness
4.0
4.0
4.0
4.0
Table 2b
Protective
Sleeve
Nominal thickness
5.5
5.5
5.5
5.5
Protective
Sleeve
Nominal thickness
5.5
5.5
5.5
5.5
Cable outer diameter||tt ||UYP-3.6/6,UYPD-3.6/6
minimum
51.3
53.9
57.0
60.8
mm
Maximum value
57.3
59.9
63.0
66.8
mm
Cable outer diameter
UYPT-3.6/6
minimum
51.8
54.8
58.3
61.7
UYPTD-3.6/6||tt| |Maximum value
57.8
60.8
64.3
67.7
5 Technical requirements
GB 12972.7—91
5.1 The technical requirements of the cable should comply with Table 3 and Table 4. Table 3
Nominal cross-section of power core, mm2
16
25
35
50
5.2 conductor||tt| |5.2.1 Single wires in conductors are allowed to be tinned.
5.3 Insulation
Insulation resistance at 20C, minimum value of MQ·km
750
650
550
500||tt| |5.3.1 The insulation should be made of ethylene-propylene rubber-based insulation rubber. Its performance should comply with the XJ-30A requirements in GB7594.8, but the tensile strength should not be less than 6.5MPa.
5.3.2 The conductor shield adopts the Class A or Class C structure in Table 4 of GB12972.1, and the insulation shield adopts the Class A structure in Table 5 of GB12972.1: UYP36/6, UYPD-36/6.... Structure UYPT-3.6/6, UYPTD-3.6/6
5.4 cable core
5.4.1 The position of the ground core should comply with the following regulations: UYP-3.6/6, UYPD-3.6/6. ..
Class B or C structure
.GB12972.1 Article 7.4 b.
UYPT-3.6/6,UYPTD-3.6/6
+
5.4.2 The stranded pitch ratio of the cable core should not be greater than 12. The provisions of Article 7.4c of GB12972.1.
5.5 sheath
5.5.1 sheath is a single-layer structure. UYP-3.6/6 and UYPT-3.6/6 cables are made of chloroprene rubber or chlorosulfonated polyethylene as the base material. The performance of the sheath rubber complies with the requirements of type S-1 in Appendix A of this standard. UYPD-3.6/6 and UYPTD-3.6/6 cables use sheath rubber based on chlorosulfonated polyethylene or ethylene-propylene rubber. , its performance complies with the requirements of type S-2 in Appendix A of this standard. 5.5.2 The color of the sheath is black.
6 Test and Inspection Rules
Products are tested according to Table 4.
Table 4
Serial number
1
1.1
1.2
1.3
1.4
Project name
Structural dimensions
Conductor
Insulation thickness
Shielding layer
Cable core
Technical requirements
GB12972.1 No. Article 4.1 and Article 5.2 of this standard GB12972.1 Article 5.2 and Table 2a and Table 2b of this standard Article 5.3.2 of this standard
Article 7 of GB12972.1 and Article 5.4 of this standard Test type|| tt||T,s
T,s
T,s
T,s
Test method
GB4909.2
GB2951.2
Visual inspection
Hanging visual inspection
Serial number
1.5
1.6
2
2.1| |tt||2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9||tt ||2.10
2.11
2.12
2.13
3
4
Project name
Sheath thickness
Cable outer diameter
Cable performance| |tt||Conductor resistance
Insulation resistance
Transition resistance
Power frequency AC voltage
Test
Combustion test
Partial discharge test
Positive dielectric loss angle
Shear test
Impact voltage test
4h voltage test
Insulation water absorption
Dielectric constant|| tt||Insulation physical machinery
Performance
Sheath physical machinery
Performance
Identification mark
Delivery length
GB12972.7 -91
Continued Table 4
Technical requirements
Article 8 of GB12972.1 and Table 2a and Table 2b of this standard and Table 2a and Table 2b of this standard
GB12972. 1 Table 1
Table 3 of this standard
GB12972.1 Article 11.4
GB12972.1 Table 8
GB12972.1 Article 11.6
1.5 U discharge amount is not greater than 20pC
US is not greater than 0.035
95℃, 60kV positive and negative polarity 10 times each, power frequency 11kV15min
power frequency AC test voltage 3U|| tt||1~14d capacitance increase rate <6%
7~14d capacitance increase rate ≤2.5%
≤4.5
Article 5.3 of this standard
This standard Article 5.5
GB12972.1 Article 10
GB12972.1 Article 11.12
Note: ①St means periodic testing, which should be conducted at least once a year. Test type
T,s
T,s
T,R
T,R
T,s
T,R
T,St
T,S
T,St
T,St
T,St
T,St|| tt||T,St
T,St
T,St
T,St
T,St
R
Test Method
GB2951.3
GB2951.4
GB3048.4
GB3048.5
GB12972.1 Appendix D
GB3048. 8
GB12666.2
GB3048
GB3048.11
GB3048
GB3048.8
GB12972.1
Appendix E | |tt | The length between terminal accessories is 10~15m. The test is conducted on the same sample in the order of 2.6, 2.7, 2.8 and 2.9. Items 2.7 and 2.9 can also be sampled separately. Serial number
1
1.1
1.2
1.3
2
2.1
2.2
2.3| |tt||2.4
3
3.1
3.2
4
4.1
4.2
5||tt ||5.1
5.2
Sample before aging
Tensile strength
Elongation at break
Tear strength
Air box Thermal aging test
Test temperature
Test time
tensile strength change rate
change rate of elongation at break
elongation at break||tt ||GB12972.7-91
Appendix A
Rubber insulation performance requirements
(Supplement)
Table A1
Test items||tt| |Minimum value
Minimum value
Minimum value
Maximum value
Maximum value
Minimum value
Breaking elongation after 14d and 28d aging The ratio of the difference between the median length value and the elongation at break before aging
Air elastic aging test
Test temperature
Test pressure
Test time
Change rate of tensile strength
Change rate of elongation at break
Oil immersion test
Test temperature
Test time
Change rate of tensile strength|| tt||Change rate of elongation at break
Hot elongation test
Test temperature
Mechanical stress
Loading time
Load elongation||tt ||Permanent deformation after cooling
maximum value
maximum value
maximum value
maximum value
maximum value
maximum value|| tt||Maximum
MPa
%
N/mm
℃
h
%
%| |tt||%
℃
kPa
h
%
%
℃
h||tt ||%
%
℃
kPa
min
%
%
11.0
250
5
S-1
standard
refers to
11.0
250
5
120±2110±11
7×2428x Chang4
±30±50)
±40
1201)
—±201)|| tt||127±1
550±20
42
±50
±50
100±2
24|| tt||—40
40
200±2
200
15
175
25
S- 2
120±2
7×24
±30
±40
100±2
24
-40
-40
200±2
200
15
175
25
serial number||tt ||6.1
Low temperature tensile test
Test temperature
Test time
Elongation at break
GB12972.7-91
Continued table A1
Test items
Minimum value
Note: 1) This test will only be carried out when requested by the user. Additional instructions:
This standard is approved by the People's Republic of China Mechanical and Electronics The Ministry of Industry proposed this standard and it is under the jurisdiction of the Shanghai Cable Research Institute of the Ministry of Mechanical and Electronic Industry. ℃
h
%
S-1
Indicator
S2
-40±2
4|| tt||250
This standard is drafted by the Shanghai Cable Research Institute of the Ministry of Machinery and Electronics Industry, Fushun Branch of the General Institute of Coal Research and other units. Persons in charge of drafting this standard: Liu Fenglin, Hu Jianguo13
3
4
Project name
Sheath thickness
Cable outer diameter
Cable performance
Conductor resistance
Insulation resistance
Transition resistance
Power frequency AC voltage
Test
Combustion test
Partial discharge test
Medium Positive loss angle
Shear test
Impact voltage test
4h voltage test
Insulation water absorption
Dielectric constant
Insulation physical machinery
Performance
Sheath physical machinery
Performance
Identification mark
Delivery length
GB12972.7-91||tt| |Continued Table 4
Technical requirements
Article 8 of GB12972.1 and Table 2a and Table 2b of this standard Table 2a and Table 2b of this standard
GB12972.1 Table 1||tt ||Table 3 of this standard
GB12972.1 Article 11.4
GB12972.1 Table 8
GB12972.1 Article 11.6
1.5U discharge capacity shall not exceed 20pC || tt | Capacitance increase rate <6%
7~14d Capacitance increase rate ≤2.5%
≤4.5
Article 5.3 of this standard
Article 5.5 of this standard||tt ||GB12972.1 Article 10
GB12972.1 Article 11.12
Note: ①St means periodic testing, which should be conducted at least once a year. Test type
T,s
T,s
T,R
T,R
T,s
T,R
T,St
T,S
T,St
T,St
T,St
T,St|| tt||T,St
T,St
T,St
T,St
T,St
R
Test Method
GB2951.3
GB2951.4
GB3048.4
GB3048.5
GB12972.1 Appendix D
GB3048. 8
GB12666.2
GB3048
GB3048.11
GB3048
GB3048.8
GB12972.1
Appendix E | |tt | The length between terminal accessories is 10~15m. The test is conducted on the same sample in the order of 2.6, 2.7, 2.8 and 2.9. Items 2.7 and 2.9 can also be sampled separately. Serial number
1
1.1
1.2
1.3
2
2.1
2.2
2.3| |tt||2.4
3
3.1
3.2
4
4.1
4.2
5||tt ||5.1
5.2
Sample before aging
Tensile strength
Elongation at break
Tear strength
Air box Thermal aging test
Test temperature
Test time
tensile strength change rate
change rate of elongation at break
elongation at break||tt ||GB12972.7-91
Appendix A
Rubber insulation performance requirements
(Supplement)
Table A1
Test items||tt| |Minimum value
Minimum value
Minimum value
Maximum value
Maximum value
Minimum value
Breaking elongation after 14d and 28d aging The ratio of the difference between the median length value and the elongation at break before aging
Air elastic aging test
Test temperature
Test pressure
Test time
Change rate of tensile strength
Change rate of elongation at break
Oil immersion test
Test temperature
Test time
Change rate of tensile strength|| tt||Change rate of elongation at break
Hot elongation test
Test temperature
Mechanical stress
Loading time
Load elongation||tt ||Permanent deformation after cooling
maximum value
maximum value
maximum value
maximum value
maximum value
maximum value|| tt||Maximum
MPa
%
N/mm
℃
h
%
%| |tt||%
℃
kPa
h
%
%
℃
h||tt ||%
%
℃
kPa
min
%
%
11.0
250
5
S-1
standard
refers to
11.0
250
5
120±2110±11
7×2428x Chang4
±30±50)
±40
1201)
—±201)|| tt||127±1
550±20
42
±50
±50
100±2
24|| tt||—40
40
200±2
200
15
175
25
S- 2
120±2
7×24
±30
±40
100±2
24
-40
-40
200±2
200
15
175
25
serial number||tt ||6.1
Low temperature tensile test
Test temperature
Test time
Elongation at break
GB12972.7-91
Continued table A1
Test items
Minimum value
Note: 1) This test will only be carried out when requested by the user. Additional instructions:
This standard is approved by the People's Republic of China Mechanical and Electronics The Ministry of Industry proposed this standard and it is under the jurisdiction of the Shanghai Cable Research Institute of the Ministry of Mechanical and Electronic Industry. ℃
h
%
S-1
Indicator
S2
-40±2
4|| tt||250
This standard is drafted by the Shanghai Cable Research Institute of the Ministry of Machinery and Electronics Industry, Fushun Branch of the General Institute of Coal Research and other units. Persons in charge of drafting this standard: Liu Fenglin, Hu Jianguo13
3
4
Project name
Sheath thickness
Cable outer diameter
Cable performance
Conductor resistance
Insulation resistance
Transition resistance
Power frequency AC voltage
Test
Combustion test
Partial discharge test
Medium Positive loss angle
Shear test
Impact voltage test
4h voltage test
Insulation water absorption
Dielectric constant
Insulation physical machinery
Performance
Sheath physical machinery
Performance
Identification mark
Delivery length
GB12972.7-91||tt| |Continued Table 4
Technical requirements
Article 8 of GB12972.1 and Table 2a and Table 2b of this standard Table 2a and Table 2b of this standard
GB12972.1 Table 1||tt ||Table 3 of this standard
GB12972.1 Article 11.4
GB12972.1 Table 8
GB12972.1 Article 11.6
1.5U discharge capacity shall not exceed 20pC
Not greater than 0.035 in US
95℃, 60kV positive and negative polarity 10 times each, power frequency 11kV15min
power frequency AC test voltage 3U
1~14d Capacitance increase rate <6%
7~14d Capacitance increase rate ≤2.5%
≤4.5
Article 5.3 of this standard
Article 5.5 of this standard||tt ||GB12972.1 Article 10
GB12972.1 Article 11.12
Note: ①St means periodic testing, which should be conducted at least once a year. Test type
T,s
T,s
T,R
T,R
T,s
T,R
T,St
T,S
T,St
T,St
T,St
T,St|| tt||T,St
T,St
T,St
T,St
T,St
R
Test Method
GB2951.3
GB2951.4
GB3048.4
GB3048.5
GB12972.1 Appendix D
GB3048. 8
GB12666.2
GB3048
GB3048.11
GB3048
GB3048.8
GB12972.1
Appendix E | |tt | The length between terminal accessories is 10~15m. The test is conducted on the same sample in the order of 2.6, 2.7, 2.8 and 2.9. Items 2.7 and 2.9 can also be sampled separately. Serial number
1
1.1
1.2
1.3
2
2.1
2.2
2.3| |tt||2.4
3
3.1
3.2
4
4.1
4.2
5||tt ||5.1
5.2
Sample before aging
Tensile strength
Elongation at break
Tear strength
Air box Thermal aging test
Test temperature
Test time
tensile strength change rate
change rate of elongation at break
elongation at break||tt ||GB12972.7-91
Appendix A
Rubber insulation performance requirements
(Supplement)
Table A1
Test items||tt| |Minimum value
Minimum value
Minimum value
Maximum value
Maximum value
Minimum value
Breaking elongation after 14d and 28d aging The ratio of the difference between the median length value and the elongation at break before aging
Air elastic aging test
Test temperature
Test pressure
Test time
Change rate of tensile strength
Change rate of elongation at break
Oil immersion test
Test temperature
Test time
Change rate of tensile strength|| tt||Change rate of elongation at break
Hot elongation test
Test temperature
Mechanical stress
Loading time
Load elongation||tt ||Permanent deformation after cooling
maximum value
maximum value
maximum value
maximum value
maximum value
maximum value|| tt||Maximum
MPa
%
N/mm
℃
h
%
%| |tt||%
℃
kPa
h
%
%
℃
h||tt ||%
%
℃
kPa
min
%
%
11.0
250
5
S-1
standard
refers to
11.0
250
5
120±2110±11
7×2428x Chang4
±30±50)
±40
1201)
—±201)|| tt||127±1
550±20
42
±50
±50
100±2
24|| tt||—40
40
200±2
200
15
175
25
S- 2
120±2
7×24
±30
±40
100±2
24
-40
-40
200±2
200
15
175
25
serial number||tt ||6.1
Low temperature tensile test
Test temperature
Test time
Elongation at break
GB12972.7-91
Continued table A1
Test items
Minimum value
Note: 1) This test will only be carried out when requested by the user. Additional instructions:
This standard is approved by the People's Republic of China Mechanical and Electronics The Ministry of Industry proposed this standard and it is under the jurisdiction of the Shanghai Cable Research Institute of the Ministry of Mechanical and Electronic Industry. ℃
h
%
S-1
Indicator
S2
-40±2
4|| tt||250
This standard is drafted by Shanghai Cable Research Institute of the Ministry of Machinery and Electronics Industry, Fushun Branch of the General Institute of Coal Science and Technology and other units. Persons in charge of drafting this standard: Liu Fenglin, Hu Jianguo035 | ||7~14d capacitance increase rate≤2.5%
≤4.5
Article 5.3 of this standard
Article 5.5 of this standard
GB12972.1 Article 10| |tt||GB12972.1 Article 11.12
Note: ①St means periodic testing, which should be conducted at least once a year. Test type
T,s
T,s
T,R
T,R
T,s
T,R
T,St
T,S
T,St
T,St
T,St
T,St|| tt||T,St
T,St
T,St
T,St
T,St
R
Test Method
GB2951.3
GB2951.4
GB3048.4
GB3048.5
GB12972.1 Appendix D
GB3048. 8
GB12666.2
GB3048
GB3048.11
GB3048
GB3048.8
GB12972.1
Appendix E | |tt | The length between terminal accessories is 10~15m. The test is conducted on the same sample in the order of 2.6, 2.7, 2.8 and 2.9. Items 2.7 and 2.9 can also be sampled separately. Serial number
1
1.1
1.2
1.3
2
2.1
2.2
2.3| |tt||2.4
3
3.1
3.2
4
4.1
4.2
5||tt ||5.1
5.2
Sample before aging
Tensile strength
Elongation at break
Tear strength
Air box Thermal aging test
Test temperature
Test time
tensile strength change rate
change rate of elongation at break
elongation at break||tt ||GB12972.7-91
Appendix A
Rubber insulation performance requirements
(Supplement)
Table A1
Test items||tt| |Minimum value
Minimum value
Minimum value
Maximum value
Maximum value
Minimum value
Breaking elongation after 14d and 28d aging The ratio of the difference between the median length value and the elongation at break before aging
Air elastic aging test
Test temperature
Test pressure
Test time
Change rate of tensile strength
Change rate of elongation at break
Oil immersion test
Test temperature
Test time
Change rate of tensile strength|| tt||Change rate of elongation at break
Hot elongation test
Test temperature
Mechanical stress
Loading time
Load elongation||tt ||Permanent deformation after cooling
maximum value
maximum value
maximum value
maximum value
maximum value
maximum value|| tt||Maximum
MPa
%
N/mm
℃
h
%
%| |tt||%
℃
kPa
h
%
%
℃
h||tt ||%
%
℃
kPa
min
%
%
11.0
250
5
S-1
standard
refers to
11.0
250
5
120±2110±11
7×2428x Chang4
±30±50)
±40
1201)
—±201)|| tt||127±1
550±20
42
±50
±50
100±2
24|| tt||—40
40
200±2
200
15
175
25
S- 2
120±2
7×24
±30
±40
100±2
24
-40
-40
200±2
200
15
175
25
serial number||tt ||6.1
Low temperature tensile test
Test temperature
Test time
Elongation at break
GB12972.7-91
Continued table A1
Test items
Minimum value
Note: 1) This test will only be carried out when requested by the user. Additional instructions:
This standard is approved by the People's Republic of China Mechanical and Electronics The Ministry of Industry proposed this standard and it is under the jurisdiction of the Shanghai Cable Research Institute of the Ministry of Mechanical and Electronic Industry. ℃
h
%
S-1
Indicator
S2
-40±2
4|| tt||250
This standard is drafted by the Shanghai Cable Research Institute of the Ministry of Machinery and Electronics Industry, Fushun Branch of the General Institute of Coal Research and other units. Persons in charge of drafting this standard: Liu Fenglin, Hu Jianguo035 | ||7~14d capacitance increase rate≤2.5%
≤4.5
Article 5.3 of this standard
Article 5.5 of this standard
GB12972.1 Article 10| |tt||GB12972.1 Article 11.12
Note: ①St means periodic testing, which should be conducted at least once a year. Test type
T,s
T,s
T,R
T,R
T,s
T,R
T,St
T,S
T,St
T,St
T,St
T,St|| tt||T,St
T,St
T,St
T,St
T,St
R
Test Method
GB2951.3
GB2951.4
GB3048.4
GB3048.5
GB12972.1 Appendix D
GB3048. 8
GB12666.2
GB3048
GB3048.11
GB3048
GB3048.8
GB12972.1
Appendix E | |tt | The length between terminal accessories is 10~15m. The test is conducted on the same sample in the order of 2.6, 2.7, 2.8 and 2.9. Items 2.7 and 2.9 can also be sampled separately. Serial number
1
1.1
1.2
1.3
2
2.1
2.2
2.3| |tt||2.4
3
3.1
3.2
4
4.1
4.2
5||tt ||5.1
5.2
Sample before aging
Tensile strength
Elongation at break
Tear strength
Air box Thermal aging test
Test temperature
Test time
tensile strength change rate
change rate of elongation at break
elongation at break||tt ||GB12972.7-91
Appendix A
Rubber insulation performance requirements
(Supplement)
Table A1
Test items||tt| |Minimum value
Minimum value
Minimum value
Maximum value
Maximum value
Minimum value
Breaking elongation after 14d and 28d aging The ratio of the difference between the median length value and the elongation at break before aging
Air elastic aging test
Test temperature
Test pressure
Test time
Change rate of tensile strength
Change rate of elongation at break
Oil immersion test
Test temperature
Test time
Change rate of tensile strength|| tt||Change rate of elongation at break
Hot elongation test
Test temperature
Mechanical stress
Loading time
Load elongation||tt ||Permanent deformation after cooling
maximum value
maximum value
maximum value
maximum value
maximum value
maximum value|| tt||Maximum
MPa
%
N/mm
℃
h
%
%| |tt||%
℃
kPa
h
%
%
℃
h||tt ||%
%
℃
kPa
min
%
%
11.0
250
5
S-1
standard
refers to
11.0
250
5
120±2110±11
7×2428x Chang4
±30±50)
±40
1201)
—±201)|| tt||127±1
550±20
42
±50
±50
100±2
24|| tt||—40
40
200±2
200
15
175
25
S- 2
120±2
7×24
±30
±40
100±2
24
-40
-40
200±2
200
15
175
25
serial number||tt ||6.1
Low temperature tensile test
Test temperature
Test time
Elongation at break
GB12972.7-91
Continued table A1
Test items
Minimum value
Note: 1) This test will only be carried out when requested by the user. Additional instructions:
This standard is approved by the People's Republic of China Mechanical and Electronics The Ministry of Industry proposed this standard and it is under the jurisdiction of the Shanghai Cable Research Institute of the Ministry of Mechanical and Electronic Industry. ℃
h
%
S-1
Indicator
S2
-40±2
4|| tt||250
This standard is drafted by the Shanghai Cable Research Institute of the Ministry of Machinery and Electronics Industry, Fushun Branch of the General Institute of Coal Research and other units. Persons in charge of drafting this standard: Liu Fenglin, Hu Jianguo3
2.4
3
3.1
3.2
4
4.1
4.2
5| |tt||5.1
5.2
Sample before aging
Tensile strength
Elongation at break
Tear strength
Air box thermal aging test
Test temperature
Test time
tensile strength change rate
change rate of elongation at break
elongation at break| |tt||GB12972.7-91
Appendix A
Rubber insulation performance requirements
(Supplement)
Table A1
Test items|| tt||minimum value
minimum value
minimum value
maximum value
maximum value
minimum value
after 14d and 28d aging The ratio of the difference between the middle value of the elongation at break and the elongation at break before aging
Air elastic aging test
Test temperature
Test pressure
Test time||tt ||Change rate of tensile strength
Change rate of elongation at break
Oil immersion test
Test temperature
Test time
Change rate of tensile strength
Change rate of elongation at break
Hot elongation test
Test temperature
Mechanical stress
Loading time
Load elongation| |tt||Permanent deformation after cooling
Maximum value
Maximum value
Maximum value
Maximum value
Maximum value
Maximum value
Maximum
MPa
%
N/mm
℃
h
%
%
%
℃
kPa
h
%
%
℃
h| |tt||%
%
℃
kPa
min
%
%
11.0||tt ||250
5
S-1
standard
refers to
11.0
250
5||tt ||120±2110±11
7×2428x Chang4
±30±50)
±40
1201)
—±201)
127±1
550±20
42
±50
±50
100±2
24
—40
40
200±2
200
15
175
25
S-2
120±2
7×24
±30
±40
100±2
24||tt ||-40
-40
200±2
200
15
175
25
Serial number| |tt||6.1
Low temperature tensile test
Test temperature
Test time
Elongation at break
GB12972.7-91||tt ||Continued Table A1
Test items
Minimum value
Note: 1) This test will only be carried out when requested by the user. Additional instructions:
This standard is approved by the People's Republic of China The Ministry of Mechanical and Electronic Industry proposed this standard and it is under the jurisdiction of the Shanghai Cable Research Institute of the Ministry of Mechanical and Electronic Industry. ℃
h
%
S-1
Indicator
S2
-40±2
4|| tt||250
This standard is drafted by the Shanghai Cable Research Institute of the Ministry of Machinery and Electronics Industry, Fushun Branch of the General Institute of Coal Research and other units. Persons in charge of drafting this standard: Liu Fenglin, Hu Jianguo3
2.4
3
3.1
3.2
4
4.1
4.2
5| |tt||5.1
5.2
Sample before aging
Tensile strength
Elongation at break
Tear strength
Air box thermal aging test
Test temperature
Test time
tensile strength change rate
change rate of elongation at break
elongation at break| |tt||GB12972.7-91
Appendix A
Rubber insulation performance requirements
(Supplement)
Table A1
Test items|| tt||minimum value
minimum value
minimum value
maximum value
maximum value
minimum value
after 14d and 28d aging The ratio of the difference between the middle value of the elongation at break and the elongation at break before aging
Air elastic aging test
Test temperature
Test pressure
Test time||tt ||Change rate of tensile strength
Change rate of elongation at break
Oil immersion test
Test temperature
Test time
Change rate of tensile strength
Change rate of elongation at break
Hot elongation test
Test temperature
Mechanical stress
Loading time
Load elongation| |tt||Permanent deformation after cooling
Maximum value
Maximum value
Maximum value
Maximum value
Maximum value
Maximum value
Maximum
MPa
%
N/mm
℃
h
%
%
%
℃
kPa
h
%
%
℃
h| |tt||%
%
℃
kPa
min
%
%
11.0||tt ||250
5
S-1
standard
refers to
11.0
250
5||tt ||120±2110±11
7×2428x Chang4
±30±50)
±40
1201)
—±201)
127±1
550±20
42
±50
±50
100±2
24
—40
40
200±2
200
15
175
25
S-2
120±2
7×24
±30
±40
100±2
24||tt ||-40
-40
200±2
200
15
175
25
Serial number| |tt||6.1
Low temperature tensile test
Test temperature
Test time
Elongation at break
GB12972.7-91||tt ||Continued Table A1
Test items
Minimum value
Note: 1) This test will only be carried out when requested by the user. Additional instructions:
This standard is approved by the People's Republic of China The Ministry of Mechanical and Electronic Industry proposed this standard and it is under the jurisdiction of the Shanghai Cable Research Institute of the Ministry of Mechanical and Electronic Industry. ℃
h
%
S-1
Indicator
S2
-40±2
4|| tt||250
This standard is drafted by the Shanghai Cable Research Institute of the Ministry of Machinery and Electronics Industry, Fushun Branch of the General Institute of Coal Research and other units. Persons in charge of drafting this standard: Liu Fenglin, Hu Jianguo7-91
Continued Table A1
Test items
Minimum value
Note: 1) This test will only be carried out when requested by the user. Additional instructions:
This standard was proposed by the Ministry of Mechanical and Electronic 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. ℃
h
%
S-1
Indicator
S2
-40±2
4|| tt||250
This standard is drafted by the Shanghai Cable Research Institute of the Ministry of Machinery and Electronics Industry, Fushun Branch of the General Institute of Coal Research and other units. Persons in charge of drafting this standard: Liu Fenglin, Hu Jianguo7-91
Continued Table A1
Test itemswww.bzxz.net
Minimum value
Note: 1) This test will only be carried out when requested by the user. Additional instructions:
This standard was proposed by the Ministry of Mechanical and Electronic 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. ℃
h
%
S-1
Indicator
S2
-40±2
4|| tt||250
This standard is drafted by the Shanghai Cable Research Institute of the Ministry of Machinery and Electronics Industry, Fushun Branch of the General Institute of Coal Research and other units. Persons in charge of drafting this standard: Liu Fenglin, Hu Jianguo
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