This standard specifies the models, specifications, technical requirements, test methods, inspection rules, packaging, transportation and storage of AC rated voltage 10kV and 35kV overhead insulated cable products. This standard applies to copper core, aluminum core, aluminum alloy core cross-linked polyethylene and high-density polyethylene insulated overhead cables for overhead power lines with AC rated voltage. GB 14049-1993 Rated voltage 10 kv.35 kV overhead insulated cable GB14049-1993 Standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
Aerial insulated cables with rated voltages of10kV and 35kV
1 Subject content and scope of application
GB14049-93
this The standard stipulates the models, specifications, technical requirements, test methods, acceptance rules, packaging, transportation and storage of AC rated voltage 10kV and 35kV overhead insulated cable (overhead cable) products. This standard applies to copper core, aluminum core, aluminum alloy core cross-linked polyethylene (XLPE) and high-density polyethylene ( HDPE) insulated overhead cables. 2 Reference standards
9 Aluminum stranded wire and steel core aluminum stranded wire
GB1179
GB2900.10 Electrical terminology Part 10 Wires and cables GB2951
GB3048||tt ||GB3953
GB3955
GB3957
GB4005
GB:4909
GB6995
GB7893
GB9329||tt ||Test method for mechanical physical properties of wires and cables Test method for electrical properties of wires and cables
Electrical round copper wire
Electrical round aluminum wire
Power cable copper and aluminum conductive core||tt| |Wire and cable delivery tray
Bare wire test method
Wire and cable identification mark method
Electrical round aluminum wire and round aluminum alloy wire Aluminum magnesium silicon alloy round wire aluminum alloy stranded wire and steel core aluminum alloy stranded wire
3 terms, symbols and codes
3.1 terminology
3.1.1 The terminology of this standard adopts the interpretation of GB2900.10, 3.1.2 rated voltage
The rated voltage is the reference voltage for cable design and operation, expressed by U (U.), in kV. U—The effective value of the voltage between the two conductors of a multi-core cable. Um——The maximum effective value of the highest voltage of the equipment system. 3.1.3 Rated voltage U (U.) 10 (12) kV, 35 (42) kV overhead cables can be used in systems where the single-phase ground fault time is generally not more than 1 minute each time, and can also be used for a maximum time of not more than 8 hours. A system that does not exceed a total of 125 hours per year. 3.2 Symbols and codes
3.2.1 Series codes
Approved by the State Bureau of Technical Supervision on 1993-01-04 for implementation on 1993-07-01
Overhead cable series
3.2. 2Material and structural characteristics code
Copper conductor
Soft copper conductor
Aluminum conductor
Aluminum alloy conductor
Cross-linked polyethylene insulation||tt| |High-density polyethylene insulation
Natural insulation
Weather-resistant black insulation
Lightweight thin insulation structure
Ordinary insulation structure
3.3 Product representation method||tt ||GB14049--93
JK
Omitted
TR
L
LH
YJ
Y|| tt||/B
Omitted
/Q
Omitted
3.3.1 Products are represented by model, specification and this standard number. 3.3.2 Example:
Aluminum core cross-linked polyethylene lightweight thin insulated overhead cable, rated voltage 10kV, single core, nominal cross-section 120mm, expressed as: a.
JKLYJ/Q-101X120GB14049 —93
Zinc steel stranded wire, nominal cross-section is 95mm2, expressed as: JKLYJ/B-103X240+95(A) GB14049-93 aluminum alloy core polyethylene insulated overhead cable, rated voltage 10kV, single core, nominal cross-section is 185mm\ , expressed as: JKLHY-101X185GB14049—93
4 Usage characteristics
4.1 Rated voltage is 10kV, 35kV.
4.2 The cable laying temperature should not be lower than 20℃. 4.3 The maximum temperature of the cable during short circuit (the longest duration does not exceed 5s): cross-linked polyethylene insulation
high-density polyethylene insulation
250℃
150℃||tt| |4.4 The maximum long-term allowable operating temperature of the cable conductor: The cable with load-bearing wire structure is determined by the maximum long-term allowable operating temperature of the insulation a.
XLPE insulation
HDPE insulation||tt ||90℃
75℃
b. No load-bearing wire structure cable
Fan (under consideration)
4.5 The allowable bending radius of the cable
The allowable bending radius of the cable should not be less than the diameter of the cylinder used in the cable bending test. 5 Model
The models of overhead cables are shown in Table 1.
Type
No.
JKYJ
JKTRYJ
JKLYJ
JKLHYJ
JKY
JKTRY|| tt||JKLY
JKLHY
JKLYJ/B
JKLHYJ/B
JKLYJ/Q
JKLHYJ/Q
JKLY/Q
JKLHY/Q
6 specifications
name
GB14049—93
Table 1
name
XLPE insulated overhead cable
Soft copper core XLPE insulated overhead cable Aluminum core XLPE insulated overhead cable
Aluminum alloy core XLPE insulated overhead cable Copper core PE insulated Aerial cables
Soft copper core polyethylene insulated overhead cables
Aluminum core polyethylene insulated overhead cables
Aluminum alloy core polyethylene insulated overhead cables
Aluminum core natural color cross-linked Polyethylene insulated overhead cable aluminum alloy core natural cross-linked polyethylene insulated overhead cable aluminum core lightweight cross-linked polyethylene thin insulated overhead cable aluminum alloy core lightweight cross-linked polyethylene thin insulated overhead cable aluminum core lightweight polyethylene thin insulated overhead cable aluminum alloy Core lightweight polyethylene thin insulated overhead cables The specifications of overhead cables are shown in Table 2.
Table 2
Type
No.
JKYJ
JKTRYJ
JKLYJ
JKLHYJ
JKY| |tt||JKTRY
JKLY
JKLHY
JKLYJ/Q
JKLHYJ/Q
JKLY/Q
JKLHY/Q| |tt||core
1
3
number
main purpose
overhead fixed number equipment, soft copper core products are used for transformer down conductors .
When erecting cables, a certain distance between the cables and trees should be considered. When the cables are running, frequent contact between the cables and trees is allowed
Overhead fixed laying
When erecting cables, cables and trees should be considered Keep a certain distance. Frequent contact between cables and trees is allowed when the cable is running | Short-time contact
Rated voltage, kV
10
10~300
25~300
3+K(A)
Or 3+K(B)
1
25～300
nominal cross-section, mm2
where K25~120
10~300|| tt||35
50~300
Type
No.
JKLYJ/B
JKLHYJ/B
Core||tt| |3
Number
3+K(A)
or 3+K(B)
GB14049-93
Continued Table 2||tt ||10
25~300
25~300
rated voltage, kv
nominal cross-section, mm
where K25~120||tt ||35
Note: ① K is the load-bearing stranded wire. According to the engineering design requirements, the cross-section specified in Table 2 can be selected to match the corresponding conductor cross-section. This load-bearing cable is not included in the cable structure. ② Among them (A) represents the steel load-bearing stranded wire, and (B) represents the aluminum alloy load-bearing stranded wire. 7 Technical requirements
7.1 The structure and technical parameters of overhead insulated cables are as specified in Table 3, and the breaking force requirements of load-bearing stranded wires are as specified in Table 4. 7.2 Conductors and load-bearing stranded wires
7.2.1 Conductors should Use tightly pressed circular stranded hard copper, hard aluminum or aluminum alloy conductors. The copper conductor should use TY type hard copper round wire and comply with GB3953 regulations; the aluminum conductor should use LY8 or LY9 type hard aluminum round wire and comply with GB3955. Regulations; Aluminum alloy conductors should use LHA or LHB type aluminum alloy round wires and comply with the regulations of GB7893. The structural dimensions, mechanical breaking force and conductor resistance of the conductor should comply with the requirements in Table 3.
7.2.2 The conductor of the overhead cable used as the down conductor of the transformer should be TR-type soft copper round wire and comply with the regulations of GB3953. 7.2.3 The material and structure of the load-bearing stranded wire shall comply with the corresponding provisions of GB7893 or GB1179, and its breaking force shall comply with the provisions of Table 4. 7.2.4 The surface of the conductor should be smooth and clean, free of oil stains, burrs, sharp edges, and raised or broken single wires that damage the shielding and insulation. 7.2.5 The section diameter ratio and twisting direction of conductors during stranding should comply with the regulations of GB3957. 7.2.6 When the number of single wires in the conductor is 7 or less, no joints are allowed on all single wires. When there are more than 7 single wires, joints are allowed on the single wires, but the distance between the joints of two single wires on the finished twisted wire should not be less than 15m. 7.3 Insulation
7.3.1 The insulation should be cross-linked polyethylene (XLPE) or high-density polyethylene (HDPE) mixture. If there is no semi-conductive shielding layer outside the insulation layer, the insulation material should be black weather-resistant material. The performance of insulating materials should comply with the requirements of Appendix C. 7.3.2 The insulation should be tightly packed on the conductor or conductor shielding layer, and the insulation surface should be smooth and uniform in color. 14049-93
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load-bearing stranded wire cross-section
mm
25
35
50
70
95
120
GB14049—93
Table 4
The breaking force of the steel load-bearing stranded wire shall not be less than
N||tt ||30000
42000
56550
81150
110150
The breaking force of aluminum alloy load-bearing stranded wire is not less than
N|| tt||6284
8800
12569
17596
23880
30164
7.3.3 The nominal thickness of the insulation shall comply with Table 3 It is stipulated that the average insulation thickness should not be less than the nominal value, and the thickness at the thinnest point should not be less than 90% of the nominal value minus 0.1mm.
7.3.43-core cable insulation surface is recommended to use protruding marks marked with identifiable phase sequence. Phase A has one ridge, phase B has two ridges, and phase C has three ridges. Other durable marking methods may be used. 7.4 Shielding
7.4.1 Conductor shielding
In addition to light and thin insulation structures, the surface of the conductor should have a semi-conductive shielding layer. The semi-conductive material used for conductor shielding can be cross-linked or non-cross-linked Type, the semi-conductive shielding layer should be evenly covered on the conductor, the surface should be smooth, without obvious stranded wire ridges, and there should be no sharp corners, particles, burnt or scratched marks. The thickness of the semiconductive shielding layer should comply with the requirements in Table 3. The performance of semi-conductive shielding materials should comply with the provisions of Appendix C. 7.4.2 Insulation shielding
The insulated cores of 3-core twisted cables should have extruded semi-conductive layers as insulation shields. Single-core cables are all made of weather-resistant black insulation and are not covered with semi-conductive shielding layers.
The insulating shielding layer should be made of peelable semi-conductive cross-linked material and should be evenly covered on the insulating surface. The surface should be smooth and should have no sharp corners, particles, burnt or scratched marks.
The average thickness of the insulation shielding layer should not be less than the nominal value specified in Table 3, and the thickness at the thinnest point should not be less than 90% of the nominal value minus 0.1mm.
7.5 Cable
3-core cable should be twisted into a cable, the pitch diameter ratio of the cable should be less than 25, and the twisting direction should be right. If there is a load-bearing stranded wire, the load-bearing stranded wire should be in the center position. 7.6 Test conditions
7.6.1 Unless otherwise specified, the ambient temperature for voltage tests is 20 ± 15°C, and the ambient temperature for other project tests is 20 ± 5°C. 7.6.2 The frequency of the AC voltage test is 49 to 61 Hz, and the voltage waveform should basically be a sinusoidal waveform. 7.6.3 The impulse voltage test waveform stipulates that the wave head is 1 to 5 μs and the wave tail is 40 to 60 μs. 7.7 Routine testing (test type code R). 7.7.1 Conductor DC resistance test
Conductor DC resistance shall comply with the requirements in Table 3.
7.7.2 Insulation resistance test
For uninsulated and shielded cables, the insulation resistance test should be carried out. The test was carried out on reeled cables. At room temperature, immerse the cable in water for no less than 1 hour, apply 80500V DC voltage, and the stabilization time should be no less than 1 minute and no more than 5 minutes. The insulation resistance of cables with a rated voltage of 10kV should not be less than 1500MQ·km, and the insulation resistance of light-weight thin insulated structure cables should not be less than 1000MQ·km. The insulation resistance of cables with rated voltage 35kV should not be less than 4100Ma·km.
7.7.3 AC voltage test
GB14049-93
The test is carried out on the cable in a coil. At room temperature, immerse the cable in water for no less than 1 hour and then apply the test voltage. The test maintenance time is 1 minute. The cable should not break down. The test voltage values ??corresponding to each rated voltage cable are as specified in Table 5. Table 5
Rated voltage U
Test voltage
7.7.4 Partial discharge test
Ordinary insulated structural cable
18
10| |tt||Lightweight thin insulated structural cable
12
35
63
7.7.4.1 10kV cables with insulation shielding shall be subjected to partial discharge test. The test shall be Performed on a coil of cable immersed in water. 7.7.4.2 When an AC voltage of 9kV is applied to the cable, the discharge of the cable should not be greater than 20pC. 7.8 Sampling test (test type code S) 7.8.1 Quantity of sampling test
kv
7.8.1.1 Structural dimension inspection should be carried out on each batch of cable segments of the same model and specification, and the number should be No more than 10% of the number of cable segments in the delivery batch.
7.8.1.2
2 The total length of the 3-core cable in the delivery batch exceeds 2km, and the total length of the single-core cable exceeds 4km. The number of samples to be taken can be determined according to Table 6.
Table 6
Cable delivery length L, km
3-core cable
27 Routine tests (test type code R). 7.7.1 Conductor DC resistance test
Conductor DC resistance shall comply with the requirements in Table 3.
7.7.2 Insulation resistance test
For uninsulated and shielded cables, the insulation resistance test should be carried out. The test was carried out on reeled cables. At room temperature, immerse the cable in water for no less than 1 hour, apply 80500V DC voltage, and the stabilization time should be no less than 1 minute and no more than 5 minutes. The insulation resistance of cables with a rated voltage of 10kV should not be less than 1500MQ·km, and the insulation resistance of light-weight thin insulated structure cables should not be less than 1000MQ·km. The insulation resistance of cables with rated voltage 35kV should not be less than 4100Ma·km.
7.7.3 AC voltage test
GB14049-93
The test is carried out on the cable in a coil. At room temperature, immerse the cable in water for no less than 1 hour and then apply the test voltage. The test maintenance time is 1 minute. The cable should not break down. The test voltage values ??corresponding to each rated voltage cable are as specified in Table 5. Table 5
Rated voltage U
Test voltage
7.7.4 Partial discharge test
Ordinary insulated structural cable
18
10| |tt||Lightweight thin insulated structural cable
12
35
63
7.7.4.1 10kV cables with insulation shielding shall be subjected to partial discharge test. The test shall be Performed on a coil of cable immersed in water. 7.7.4.2 When an AC voltage of 9kV is applied to the cable, the discharge of the cable should not be greater than 20pC. 7.8 Sampling test (test type code S) 7.8.1 Quantity of sampling test
kv
7.8.1.1 Structural dimension inspection should be carried out on each batch of cable segments of the same model and specification, and the number should be No more than 10% of the number of cable segments in the delivery batch.
7.8.1.2
2 The total length of the 3-core cable in the delivery batch exceeds 2km, and the total length of the single-core cable exceeds 4km. The number of samples to be taken can be determined according to Table 6.
Table 6
Cable delivery length L, km
3-core cable
27 Routine tests (test type code R). 7.7.1 Conductor DC resistance test
Conductor DC resistance shall comply with the requirements in Table 3.
7.7.2 Insulation resistance test
For uninsulated and shielded cables, the insulation resistance test should be carried out. The test was carried out on reeled cables. At room temperature, immerse the cable in water for no less than 1 hour, apply 80500V DC voltage, and the stabilization time should be no less than 1 minute and no more than 5 minutes. The insulation resistance of cables with a rated voltage of 10kV should not be less than 1500MQ·km, and the insulation resistance of light-weight thin insulated structure cables should not be less than 1000MQ·km. The insulation resistance of cables with rated voltage 35kV should not be less than 4100Ma·km.
7.7.3 AC voltage test
GB14049-93
The test is carried out on the cable in a coil. At room temperature, immerse the cable in water for no less than 1 hour and then apply the test voltage. The test maintenance time is 1 minute. The cable should not break down. The test voltage values ??corresponding to each rated voltage cable are as specified in Table 5. Table 5
Rated voltage U
Test voltage
7.7.4 Partial discharge test
Ordinary insulated structural cable
18
10| |tt||Lightweight thin insulated structural cable
12
35
63
7.7.4.1 10kV cables with insulation shielding shall be subjected to partial discharge test. The test shall be Performed on a coil of cable immersed in water. 7.7.4.2 When an AC voltage of 9kV is applied to the cable, the discharge of the cable should not be greater than 20pC. 7.8 Sampling test (test type code S) 7.8.1 Quantity of sampling test
kv
7.8.1.1 Structural dimension inspection should be carried out on each batch of cable segments of the same model and specification, and the number should be No more than 10% of the number of cable segments in the delivery batch.
7.8.1.2
2 The total length of the 3-core cable in the delivery batch exceeds 2km, and the total length of the single-core cable exceeds 4km. The number of samples to be taken can be determined according to Table 6.
Table 6
Cable delivery length L, km
3-core cable
2
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