RHZ1-2OL-AL Medium Voltage Power Cable(8.7/15kV, 12/20kV, 18/30kV)
RHZ1-2OL-AL Medium Voltage Power Cable (8.7/15kV, 12/20kV, 18/30kV) is an economical, fire-safe cable for medium voltage distribution. Featuring stranded aluminium conductors, cross-linked polyethylene (XLPE) insulation, metallic screen, and low smoke zero halogen (LSZH) outer sheath, it complies with UNE 21123-4 and CPR standards. In fire conditions, the LSZH sheath emits minimal smoke and no toxic halogen gases, ensuring safety in populated areas. Lightweight aluminium reduces costs and handling effort while providing reliable current capacity. Superior partial discharge resistance, low dielectric losses, and high thermal stability guarantee efficient, long-lasting performance. Suitable for direct burial, ducts, or indoor installations. The RHZ1-2OL-AL Medium Voltage Power Cable is widely used in utilities, hospitals, schools, tunnels, and infrastructure projects requiring cost-effective, environmentally friendly medium voltage cabling with enhanced fire safety and durability worldwide.
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Voltage Rating(Uo/U)(Um)
8.7/15 (17.5) KV
12/20 (24)KV
18/30 (36)KV - Temperature Rating -40°C to +90°C
- Minimum Bending Radius 15 x overall diameter
Construction
Technical Specifications
Quality Control
Application
Construction
RHZ1-2OL-AL Medium Voltage Power Cable Constrution
Conductor
Class 2 stranded aluminium with longitudianal water tightness
Insulation
XLPE (Cross-Linked Polyethylene)
Conductor Screen
Semi-conductive material
Insulation Screen
Semi-conductive material
Longitudinal Waterblocking
Water-swellable tape
Screen
Copper Wires
Sheath
PO (Polylefin) DMZ1 ST7
Sheath Color
Red
Manufacturer Standard
IEC 60502-2, HD 620 10E-1
Halogen Free
IEC 60754-1/2
UV Resistant
UNE 211605, HD 605, Subclause 2.2.13
Technical Specifications
RHZ1-2OL-AL Medium Voltage Power Cable(8.7/15kV, 12/20kV, 18/30kV)
RHZ1-2OL-AL 8.7/15 (17.5) KV
RHZ1-2OL-AL 12/20 (24)KV
RHZ1-2OL-AL 18/30 (36)KV
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No of Cores |
Nominal Cross Section Area |
Nominal Conductor Diameter |
Nominal Thickness of Insulation |
Nominal Diameter Over insulation |
Nominal Metallic Screen Cross Section |
Nominal Outer Sheath Thickness |
Nominal Outer Diameter |
Approximate Weight |
| mm2 | mm | mm | mm | mm2 | mm | mm | kg/km | |
| 1 | 50 | 8.0 | 4.5 | 18.2 | 16 | 2.5 | 28.1 | 720 |
| 1 | 95 | 11.2 | 4.5 | 21.4 | 16 | 2.5 | 31.2 | 1100 |
| 1 | 150 | 14.0 | 4.5 | 24.2 | 16 | 2.7 | 34.1 | 1440 |
| 1 | 240 | 17.9 | 4.5 | 28.1 | 16 | 3.0 | 37.8 | 1780 |
| 1 | 400 | 23.1 | 4.5 | 33.3 | 16 | 3.0 | 42.8 | 2300 |
| 1 | 630 | 29.1 | 4.5 | 39.6 | 16 | 3.0 | 50.3 | 3190 |
|
No of Cores |
Nominal Cross Section Area |
Nominal Conductor Diameter |
Nominal Thickness of Insulation |
Nominal Diameter Over insulation |
Nominal Metallic Screen Cross Section |
Nominal Outer Sheath Thickness |
Nominal Outer Diameter |
Approximate Weight |
| mm2 | mm | mm | mm | mm2 | mm | mm | kg/km | |
| 1 | 50 | 8.0 | 5.5 | 20.2 | 16 | 2.5 | 28.0 | 850 |
| 1 | 95 | 11.2 | 5.5 | 23.4 | 16 | 2.7 | 32.0 | 1100 |
| 1 | 150 | 14.0 | 5.5 | 26.2 | 16 | 3.0 | 34.0 | 1400 |
| 1 | 240 | 17.9 | 5.5 | 30.1 | 16 | 3.0 | 38.0 | 1800 |
| 1 | 400 | 23.1 | 5.5 | 35.3 | 16 | 3.0 | 43.0 | 2500 |
| 1 | 630 | 29.1 | 5.5 | 41.6 | 16 | 3.0 | 50.0 | 3500 |
|
No of Cores |
Nominal Cross Section Area |
Nominal Conductor Diameter |
Nominal Thickness of Insulation |
Nominal Diameter Over insulation |
Nominal Metallic Screen Cross Section |
Nominal Outer Sheath Thickness |
Nominal Outer Diameter |
Approximate Weight |
| mm2 | mm | mm | mm | mm2 | mm | mm | kg/km | |
| 1 | 50 | 8.0 | 5.5 | 25.2 | 16 | 2.7 | 32.0 | 900 |
| 1 | 95 | 8.0 | 5.5 | 28.4 | 16 | 3.0 | 35.0 | 1200 |
| 1 | 150 | 8.0 | 5.5 | 31.2 | 16 | 3.0 | 38.0 | 1500 |
| 1 | 240 | 8.0 | 5.5 | 35.1 | 16 | 3.0 | 43.0 | 1900 |
| 1 | 400 | 8.0 | 5.5 | 40.3 | 16 | 3.0 | 48.0 | 2750 |
| 1 | 630 | 8.0 | 5.5 | 46.6 | 16 | 3.0 | 56.0 | 3500 |
Quality Control
RHZ1-2OL-AL Medium Voltage Power Cable(8.7/15kV, 12/20kV, 18/30kV)
Raw Material Test
Raw material testing for the RHZ1-2OL-AL Medium Voltage Power Cable (8.7/15kV, 12/20kV, 18/30kV) ensures fire-safe and reliable quality. Aluminium conductors are inspected for purity, conductivity, and mechanical properties per UNE/IEC standards. XLPE insulation compound undergoes density, antioxidant content, and crosslinking analysis via OIT and DSC tests. Screen materials are checked for thickness and adhesion. LSZH sheath compound is rigorously tested for halogen content (<0.5%), smoke density, acidity, and flame-retardant additives using IEC 60754 and EN 50399 methods. Samples endure tensile strength, elongation, and accelerated aging/thermal trials. The step-by-step process: incoming batch certification, sampling protocol, chemical composition spectroscopy, mechanical/electrical property testing (before/after aging), fire performance pre-simulation, and material approval decision.
Process inspection
During the manufacturing of the RHZ1-2OL-AL Medium Voltage Power Cable (8.7/15kV, 12/20kV, 18/30kV), process inspection maintains fire safety standards. Aluminium stranding is monitored for compactness with laser gauges. Triple extrusion (conductor shield, XLPE insulation, insulation shield) ensures concentricity and thickness using online X-ray systems. The screen application verifies overlap and bonding. LSZH sheath extrusion includes real-time spark testing and diameter verification. Marking permanence and sheath color are inspected. Key steps: material pre-drying confirmation, extrusion/screening parameter logging (temperature, pressure), intermediate hot set tests for crosslinking degree, partial discharge monitoring, flame-retardant additive distribution checks, defect detection/correction, and post-process cooling control.
Finished Product
The finished RHZ1-2OL-AL Medium Voltage Power Cable (8.7/15kV, 12/20kV, 18/30kV) undergoes comprehensive testing for fire and electrical certification. Routine tests include conductor resistance, AC high voltage withstand (up to 3.5U0), partial discharge (≤5pC), screen continuity, and thickness verification. Fire safety tests cover smoke density (IEC 61034), halogen acid gas (IEC 60754), flame propagation (IEC 60332), and heat release. Type tests include impulse withstand and thermal cycling. The process steps: sample preparation with terminations, gradual voltage ramp-up, PD monitoring, fire chamber exposure with smoke/heat measurement, environmental conditioning, post-test electrical/mechanical re-measurement, and visual inspection. Additional checks cover tan delta, capacitance, and marking durability.
Application
RHZ1-2OL-AL Medium Voltage Power Cable (8.7/15kV, 12/20kV, 18/30kV) is ideal for underground and indoor medium voltage supply in hospitals, schools, airports, tunnels, shopping malls, and high-rise buildings. Perfect for areas requiring low smoke zero halogen cables to enhance occupant safety and reduce toxic emissions during fires.
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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