Medium Voltage Unarmored Power Cable
The Medium Voltage Unarmored Power Cable is designed for efficient power transmission and distribution in utility, industrial, and commercial electrical networks. Manufactured with high-conductivity copper or aluminum conductors, advanced XLPE insulation, metallic screening, and a durable outer sheath, the cable delivers excellent electrical performance and long-term operational reliability. Designed for voltage ratings from 3.6/6kV up to 26/35kV, the cable provides superior dielectric strength, low insulation losses, and excellent thermal stability. The absence of armouring reduces cable weight and improves installation flexibility, making it particularly suitable for installations within cable trays, ducts, tunnels, and protected environments. The outer sheath provides reliable protection against moisture, chemicals, UV radiation, and environmental exposure. Manufactured according to IEC 60502-2 and international standards, the cable is widely used in substations, power plants, renewable energy facilities, industrial complexes, and utility distribution systems. The Medium Voltage Unarmored Power Cable offers a cost-effective, lightweight, and reliable solution for modern medium-voltage power transmission applications.
- Voltage Rating 0.6/1kV
- Operating Temp 90°C
- Standard IEC 60502-2
Construction
Technical Specifications
Quality Control
Application
Construction
Medium Voltage Unarmored Power Cable Construction
Product Features
Lightweight unarmored construction
XLPE insulation with excellent dielectric properties
Suitable for medium voltage networks up to 35kV
Flexible installation in ducts and cable trays
Copper wire or tape metallic screen
Low dielectric losses
Excellent thermal stability
Moisture-resistant outer sheath
XLPE insulation with excellent dielectric properties
Suitable for medium voltage networks up to 35kV
Flexible installation in ducts and cable trays
Copper wire or tape metallic screen
Low dielectric losses
Excellent thermal stability
Moisture-resistant outer sheath
Conductor Material
Copper / Aluminum
Conductor Class
IEC 60228 Class 2
Insulation Material
XLPE
Metallic Screen
Copper Tape / Copper Wire
Armour Type
SWA / STA
Outer Sheath
PVC / PE / LSZH
Technical Specifications
Medium Voltage Unarmored Power Cable
Medium Voltage Unarmored Power Cable Data Sheet
|
Specification |
Outer diameter |
Nominal thickness of insulation |
Nominal sheath thickness |
Approx. outer diameter of cable |
Approx. Weight of cable |
Ampacity of cable |
||||
|
Air |
Soil |
|||||||||
|
CU |
AL |
Cu |
Al |
Cu |
Al |
|||||
|
mm2 |
mm |
mm |
mm |
mm |
kg/km |
kg/km |
A |
A |
A |
A |
|
3×50 |
8.4 |
10.5 |
3.5 |
78.5 |
5841.2 |
4908.5 |
180 |
140 |
190 |
145 |
|
3×70 |
10.0 |
10.5 |
3.6 |
82.2 |
6723.1 |
5417.4 |
220 |
170 |
230 |
180 |
|
3×95 |
11.5 |
10.5 |
3.7 |
85.7 |
7753.9 |
5981.8 |
265 |
205 |
275 |
215 |
|
3×120 |
13.0 |
10.5 |
3.9 |
89.1 |
8785.3 |
6546.9 |
305 |
235 |
315 |
245 |
|
3×150 |
14.5 |
10.5 |
4.0 |
92.6 |
9956.9 |
7158.9 |
345 |
270 |
355 |
275 |
|
3×185 |
16.2 |
10.5 |
4.1 |
96.5 |
11304.0 |
7853.0 |
390 |
305 |
400 |
310 |
|
3×240 |
18.4 |
10.5 |
4.2 |
101.5 |
13301.6 |
8824.7 |
455 |
355 |
460 |
360 |
|
3×300 |
20.5 |
10.5 |
4.4 |
106.4 |
15420.1 |
9824.0 |
525 |
410 |
520 |
410 |
|
3×400 |
23.5 |
10.5 |
4.6 |
113.3 |
18813.5 |
11352.0 |
600 |
470 |
590 |
465 |
Quality Control
Medium Voltage Unarmored Power Cable
Raw Material Test
Raw material testing for the Medium Voltage Unarmored Power Cable 6/10-18/30kV CU/XLPE/PVC ensures full compliance with IEC 60502-2. Copper rods are tested for purity, conductivity (>99% IACS), and elongation. XLPE insulation compound is rigorously evaluated for density, melt flow index, antioxidant levels, and crosslinking potential using OIT and DSC analysis. PVC sheath material undergoes thermal stability, hardness, and plasticizer content testing. The step-by-step process includes incoming batch verification, random sampling, chemical composition analysis via spectrometry, mechanical property testing before and after aging, flame retardancy pre-checks, and final material approval decision. Only qualified materials are released, guaranteeing the Medium Voltage Unarmored Power Cable 6/10-18/30kV CU/XLPE/PVC achieves excellent conductivity, insulation integrity, and long-term durability.
Process inspection
During manufacturing of the Medium Voltage Unarmored Power Cable 6/10-18/30kV CU/XLPE/PVC, process inspection maintains strict quality control. Copper conductor stranding is monitored for compactness. Triple extrusion (conductor screen, XLPE insulation, insulation screen) controls thickness and concentricity with online X-ray systems. PVC outer sheath extrusion ensures uniform covering and surface smoothness. Real-time spark testing and partial discharge monitoring detect defects. Key steps include material pre-drying confirmation, extrusion parameter logging, intermediate hot set tests for crosslinking degree, defect detection with immediate correction, and controlled cooling. This multi-stage oversight guarantees the Medium Voltage Unarmored Power Cable 6/10-18/30kV CU/XLPE/PVC achieves void-free insulation, precise construction, and full IEC 60502-2 compliance throughout production.
Finished Product
The finished Medium Voltage Unarmored Power Cable 6/10-18/30kV CU/XLPE/PVC undergoes comprehensive testing. Routine tests include conductor resistance, AC voltage withstand, insulation thickness verification, and partial discharge (≤5pC). Mechanical tests cover tensile strength, elongation, and cold bend performance. Flame retardancy per IEC 60332-1 is verified. The process steps include sample preparation, gradual voltage ramp-up and hold period, mechanical load application, environmental conditioning, post-test electrical and mechanical re-measurement, and detailed visual inspection. Additional checks cover shrinkage, heat shock, and marking durability. Only cables passing all criteria are approved, confirming the Medium Voltage Unarmored Power Cable 6/10-18/30kV CU/XLPE/PVC’s superior electrical safety, mechanical robustness, and suitability for medium voltage power distribution.
Application
Medium Voltage Unarmored Power Cable 6/10-18/30kV is ideal for underground ducts, cable trays, and aerial installations in substations, industrial plants, renewable energy projects, and urban infrastructure requiring efficient and cost-effective medium voltage power transmission.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
Wires and Cables packaging (1)
Wires and Cables packaging (2)
Wires and Cables packaging (3)
Wires and Cables packaging (4)
Wires and Cables packaging (5)
Wires and Cables packaging (6)
Wires and Cables packaging (7)
Wires and Cables packaging (8)
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What are the advantages of power cables and overhead lines?(1) Reliable operation, because it is installed in a hidden place such as underground, it is less damaged by external forces, has less chance of failure, and the power supply is safe, and it will not cause harm to people; (2) The maintenance workload is small and frequent inspections are not required; (3) No need to erect towers; (4) Help improve power factor.
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Which aspects should be considered when choosing the cross section of a power cable?(1) The long-term allowable working current of the cable; (2) Thermal stability once short circuited; (3) The voltage drop on the line cannot exceed the allowable working range.
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What are the measures for cable fire prevention?(1) Use flame-retardant cables; (2) Use fireproof cable tray; (3) Use fireproof paint; (4) Fire partition walls and fire baffles are installed at cable tunnels, mezzanine exits, etc.; (5) Overhead cables should avoid oil pipelines and explosion-proof doors, otherwise local pipes or heat insulation and fire prevention measures should be taken.
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What should be paid attention to during the transportation and handling of cables?(1) During transportation, loading and unloading, cables and cable reels should not be damaged. It is strictly forbidden to push the cable reels directly from the vehicle. Generally, cables should not be transported and stored flat. (2) Before transporting or rolling the cable reel, ensure that the cable reel is firm, the cable is wound tightly, the oil pipe between the oil-filled cable and the pressure oil tank should be fixed without damage, the pressure oil tank should be firm, and the pressure indication should meet the requirements.
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What inspections should be carried out for the acceptance of cable lines?(1) The cable specifications should meet the regulations, the arrangement should be neat, no damage, and the signs should be complete, correct and clear; (2) The fixed bending radius of the cable, the related distance and the wiring of the metal sheath of the single-core power cable should meet the requirements; (3) The cable terminal and the middle head should not leak oil, and the installation should be firm. The oil pressure of the oil-filled cable and the meter setting should meet the requirements; (4) Good grounding; (5) The color of the cable terminal is correct, and the metal parts such as the bracket are completely painted; (6) There should be no debris in the cable trench, tunnel, and bridge, and the cover should be complete.
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