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RHZ1-2OL(AS)-AL Medium Voltage Power Cable(8.7/15kV, 12/20kV, 18/30kV Specifications)
RHZ1-2OL(AS)-AL are enhanced flame-retardant, low smoke, zero halogen (LSZH) medium voltage cables with aluminum conductors, manufactured under IEC 60502-2 standards. Featuring stranded aluminium conductors, cross-linked polyethylene (XLPE) insulation, metallic screen, and low smoke zero halogen (LSZH) outer sheath with enhanced fire performance (AS designation), it complies with UNE 21123-4 and CPR standards. In fire conditions, it emits very low smoke and no toxic gases. Aluminium construction reduces weight and costs while providing sufficient current capacity. Excellent partial discharge resistance, low dielectric losses, and high thermal stability ensure efficient, long-term operation. Suitable for direct burial, ducts, or indoor use in public areas. The RHZ1-2OL(AS)-AL Medium Voltage Power Cable is ideal for utilities, hospitals, schools, tunnels, and infrastructure projects requiring economical, high-safety medium voltage cabling with superior fire behavior and reliability 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
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Minimum Bending Radius
20 x overall diameter during installation
15 x overall diameter installed
Construction
Technical Specifications
Quality Control
Application
Construction
RHZ1-2OL(AS)-AL Medium Voltage Power Cable Constrution
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Conductor
Class 2 stranded aluminium with longitudinal 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) DMZ2/ST8
Sheath Color
Red with/Green stripes
Manufacturer Standard
IEC 60502-2, HD 620 10E-5, EN 60228
Flame retardant
CPR Classification Cca s1b, d2, a1
Halogen Free
IEC 60754-1/2
UV Resistant
UNE 211605, HD 605, Subclause 2.2.13
Technical Specifications
RHZ1-2OL(AS)-AL Medium Voltage Power Cable(8.7/15kV, 12/20kV, 18/30kV Specifications)
RHZ1-2OL(AS)-AL 8.7/15 (17.5) KV
RHZ1-2OL(AS)-AL 12/20 (24)KV
RHZ1-2OL(AS)-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(AS)-AL Medium Voltage Power Cable(8.7/15kV, 12/20kV, 18/30kV Specifications)
Raw Material Test
Raw material testing for the RHZ1-2OL(AS)-AL Medium Voltage Power Cable (8.7/15kV, 12/20kV, 18/30kV) focuses on safety and conductivity. 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. Enhanced LSZH sheath compound is rigorously tested for halogen content (<0.5%), smoke density, acidity, and advanced 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(AS)-AL Medium Voltage Power Cable (8.7/15kV, 12/20kV, 18/30kV), process inspection ensures enhanced fire safety. Aluminium stranding is monitored for compactness with laser gauges. Triple extrusion (conductor shield, XLPE insulation, insulation shield) controls concentricity and thickness using online X-ray systems. The screen application verifies overlap and bonding. Enhanced 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, advanced smoke/flame additive distribution checks, defect detection/correction, and post-process cooling control.
Finished Product
The finished RHZ1-2OL(AS)-AL Medium Voltage Power Cable (8.7/15kV, 12/20kV, 18/30kV) undergoes stringent 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. Enhanced fire tests cover smoke density (IEC 61034), halogen acid gas (IEC 60754), bundled flame propagation (EN 50399), and heat release for CPR classification. 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(AS)-AL Medium Voltage Power Cable (8.7/15kV, 12/20kV, 18/30kV) is perfect for underground and indoor medium voltage supply in hospitals, schools, airports, tunnels, shopping malls, and high-rise buildings requiring enhanced CPR fire classification and low smoke zero halogen properties for maximum occupant safety.
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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