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10kV, 35kV Insulated Overhead Cable

Standards
This 10kV insulated overhead cable strictly conforms to GB/T14049-2008 standard, namely aerial insulated cables with rated voltages of 10kV and 35kV. The 35kV type is produced according to the enterprise standard.

Working Conditions
1. The rated voltage is 10kV or 35kV.
2. The maximum operating temperature for conductor depends on the maximum working temperature of insulation, and the specific values for XLPE insulated type and HDPE insulated type are 90℃ and 75℃, respectively.
3. The maximum cable temperatures when short circuit occurs are 250℃ for XLPE insulated type, and 150℃ for HDPE insulated type. Meanwhile, the short circuit should not last for more than 5 seconds.
4. The ambient temperature when laying should not be lower than -20℃.
5. The bending radius should be bigger than the diameter of cylinder used in bending test.

Name Code
JK: Aerial cable
LH: Aluminum alloy
TR: Soft copper conductor
L: Aluminum
B: Natural color insulation
Q: Light and thin insulation

Type Descriptions
Model Product Name Laying Attentions
JKYJ Cu core XLPE insulated aerial cable They fit for overhead fixed laying, and a certain distance between cables and trees should be taken into account.
JKTRYJ Soft cu core XLPE insulated aerial cable
JKLYJ Al core XLPE insulated aerial cable
JKLHYJ Aluminum alloy core XLPE insulated aerial cable
JKY Cu core PE insulated aerial cable
JKTRY Soft cu core PE insulated aerial cable
JKLY Al core PE insulated aerial cable
JKLHY Aluminum alloy core PE insulated aerial cable
JKLYJ/B Al core natural color XLPE insulated aerial cable
JKLHYJ/B Aluminum alloy core natural color XLPE insulated aerial cable
JKLYJ/Q Al core light type XLPE insulated aerial cable These products are suitable for overhead fixed laying, and a certain distance between cables and trees should be kept when designing cable stand. During working, the contact between cable and tree should be limited to a short time.
JKLHYJ/Q Aluminum alloy core light type XLPE insulated aerial cable
JKLY/Q Al core light type PE insulated aerial cable
JKLHY/Q Aluminum alloy core light type PE insulated aerial cable
Specifications
Model Core Number Nominal Cross Section (mm2)
10kV 35kV
JKYJ
JKTRYJ
JKLYJ
JKLHYJ
1 10-300 50-300
3 25-300
3+K(A) or 3+K(B) 25-300
K: 25-120
JKY
JKTRY
JKLY
JKLHY
JKLYJ/Q
JKLHYJ/Q
JKLY/Q
JKLHY/Q
1 10-300
JKLYJ/B
JKLHYJ/B
3 25-300
3+K(A) or 3+K(B) 25-300
K: 25-120

Note:
1. K stands for load carrying stranded conductor, and any specified section in the table above can be selected to match with relevant conductor based on the requirements of engineering design. If the span of pole is so big that extra bearing wire is needed, this wire is not included in the cable structure.
2. A represents steel load carrying stranded wire, and B is aluminum alloy load carrying stranded wire.

Technical Parameters of Conductor
Nominal Section (mm2) Resistance at 20℃ (≤Ω/km) Breaking Strength (≥N)
Hard Cu Core Soft Cu Core Al Core Aluminum Alloy Core Hard Cu Core Al Core Aluminum Alloy Core
10
16
25
35
50
70
95
120
150
185
240
300
400
0.749
0.540
0.399
0.276
0.199
0.158
0.128
0.1021
0.0777
0.0619
0.0484


1.830
1.150
0.727
0.524
0.387
0.268
0.268
0.153





3.080
1.910
1.200
0.868
0.641
0.443
0.320
0.253
0.206
0.164
0.125
0.100
0.0778
1.393
1.007
0.744
0.514
0.371
0.294
0.239
0.190
0.145
0.11
6
0.0904

8465
11731
16502
23461
31759
39911
49505
61846
79832
99788
133040


3762
5177
7011
10354
13727
17339
21033
26732
34679
43349
55707


6284
8800
12569
17596
23880
30164
37706
46503
60329
75411
10548


Note: The light and thin insulated air cable is without inner semi-conducting shielding layer.

Technical Parameters of Load Carrying Stranded Wire
Cross Section (mm2) Breaking Strength of Steel Type (≥N) Breaking Strength of Aluminum Alloy Type (≥N)
25 35 50 70 95 120 30000 42000 56550 81150 110150 6284 8800 12569 17596 23880 30164
Qualifications
Item Unit Data Test Method
10kV 35kV
Resistance of Conductor at 20℃ Ω/km GB14049-1993 (see the table above) GB3048.4
Insulation Resistivity (without external shield) MΩ·km ≥1500 (≥1000 for light type) ≥4100 GB3048.5
AC Voltage Test (1minute) kV 18 (2 for light type) 63 GB3048.8
Partial Discharge Test (with external shield) pC ≤20 GB3048.12
Dimensions and Breaking Strength Test of Conductor GB14049-1993 (see the table above) GB4909.2 and GB2951.2
Hot Set Test % ≤ 175 ≤175 GB2951.18
Bending Test mm Single core: 20±5% (D+d)
Multi-core: 15±5% (D+d)
20±5% (D+d) GB2951.23
Impulse Voltage Test kV 93.8 (75 for light type) 250 GB3048.8
Tracking Resistant Test of Insulation (without external shield) A ≤0.5 ≤0.5 GB3048.7
Mechanical Property Tests of Insulation before and after Aging GB14049-1993 GB14049-1993 GB2951
Adhesive Strength (slip-off) Test of Insulation N ≥180 ≥180 GB14049-1993
Weather-proof Test of Insulation (without external shield) GB14049-1993
Peeling Test of Semi-Conducting Layer (with external shield) N 8-40 GB14049-1993
Rub-Resistant Test of Printed Mark GB6995.3

Application
This insulated overhead cable is a new product applied to overhead power transmission line, and is also the preferred choice for building or upgrading power grid with rated voltage of 10kV or 35kV. Meanwhile, it can ensure the safety of power line, and the soft copper core type is suitable for downlead of transformer.

Requirements for Delivery
For this overhead cable, there should be continuous marks like model, specification, rated voltage, manufacturer name and other information which are clear and rub-resistant. The total delivery length, and length and quantity of short cable should be decided through consultation when signing the contract.

Related Names
Copper Core Aerial Cable Manufacturer | Medium Voltage Telecommunication System | Alloy Core Electrical Cable

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