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RHZ1-2OL(S)-AL Medium Voltage Power Cable(8.7/15kV, 12/20kV, 18/30kV Specifications)
NPC Electric RHZ1-2OL(S)-AL Medium Voltage Power Cable (8.7/15kV, 12/20kV, 18/30kV) combines economy with special fire safety for demanding medium voltage networks. Built with aluminium conductors, thermosetting XLPE insulation, metallic screen, and specially formulated LSZH sheath with superior fire-retardant characteristics (S), it meets UNE 21123-4 and higher CPR classifications. The special LSZH sheath drastically reduces smoke and eliminates corrosive gases in fires. Lightweight aluminium minimizes costs and installation effort. Excellent partial discharge resistance, low tan delta, and thermal endurance ensure efficiency and longevity. Suitable for direct burial, ducts, or indoor use in high-risk areas, the RHZ1-2OL(S)-AL Medium Voltage Power Cable is favored for metro systems, data centers, public venues, and infrastructure demanding reliable medium voltage cabling with advanced fire protection, environmental compliance, and enhanced life-safety in populated or confined spaces.
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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(S)-AL Medium Voltage Power Cable Constrution
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Conductor
Class 2 stranded aluminium
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 /Grey stripes
Manufacturer Standard
IEC 60502-2, HD 620 10E-4, EN 60228
Flame retardant
CPR Classification Eca
Halogen Free
IEC 60754-1/2
UV Resistant
UNE 211605, HD 605, Subclause 2.2.13
Technical Specifications
RHZ1-2OL(S)-AL Medium Voltage Power Cable(8.7/15kV, 12/20kV, 18/30kV Specifications)
RHZ1-2OL(S)-AL 8.7/15 (17.5) KV
RHZ1-2OL(S)-AL 12/20 (24)KV
RHZ1-2OL(S)-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 | 8.0 | 25.2 | 16 | 2.7 | 32.0 | 900 |
| 1 | 95 | 11.2 | 8.0 | 28.4 | 16 | 3.0 | 35.0 | 1200 |
| 1 | 150 | 14.0 | 8.0 | 31.2 | 16 | 3.0 | 38.0 | 1500 |
| 1 | 240 | 17.9 | 8.0 | 35.1 | 16 | 3.0 | 43.0 | 1900 |
| 1 | 400 | 23.1 | 8.0 | 40.3 | 16 | 3.0 | 48.0 | 2750 |
| 1 | 630 | 29.1 | 8.0 | 46.6 | 16 | 3.0 | 56.0 | 3500 |
Quality Control
RHZ1-2OL(S)-AL Medium Voltage Power Cable(8.7/15kV, 12/20kV, 18/30kV Specifications)
Raw Material Test
For the RHZ1-2OL(S)-AL Medium Voltage Power Cable (8.7/15kV, 12/20kV, 18/30kV), raw material testing emphasizes special fire performance. Aluminium is certified for electrical grade and ductility. XLPE granules are evaluated for contamination, thermal stability, and crosslinking efficiency via microscopy and TGA. Screen materials undergo resistivity and bonding checks. Special LSZH compound faces advanced halogen-free verification, higher flame-retardant loading, smoke opacity, and corrosivity tests per EN standards. The structured process: receipt inspection, random sampling, physical/mechanical testing (tensile, elongation), chemical analysis with ion chromatography, accelerated aging and fire simulation trials, and release decision. This ensures premium inputs, establishing the base for the RHZ1-2OL(S)-AL Medium Voltage Power Cable's dielectric strength, screening reliability, special low-emission fire safety.
Process inspection
Process inspection during RHZ1-2OL(S)-AL Medium Voltage Power Cable (8.7/15kV, 12/20kV, 18/30kV) production involves continuous fire-focused monitoring. Aluminium conductor forming checks uniformity and surface quality. Triple co-extrusion ensures void-free shields and insulation with real-time thickness gauges. Screen application monitors coverage and tension. Special LSZH sheath extrusion includes online spark testing and ovality control. Critical steps: pre-extrusion compound dryness verification, parameter stabilization, capacitance-based eccentricity monitoring, gel fraction sampling, partial discharge intermediate checks, special fire-retardant additive distribution, and defect removal protocols. This multi-stage assurance maintains the RHZ1-2OL(S)-AL Medium Voltage Power Cable's precise geometry, reliable screening, uniform special LSZH sheath with advanced fire behavior, and UNE/CPR compliance throughout manufacturing.
Finished Product
Completed RHZ1-2OL(S)-AL Medium Voltage Power Cable (8.7/15kV, 12/20kV, 18/30kV) reels are subjected to comprehensive tests. Mandatory routines: DC resistance, high-potential AC test, partial discharge (≤5pC), screen resistance, and thickness checks. Special fire tests include bundled flame propagation, heat release, smoke production, and acidity measurement for advanced CPR compliance. Extended tests cover impulse and long-duration voltage. The sequential process: sample conditioning, parameter application (voltage/heat), timed fire exposure monitoring, recovery inspection, property re-measurement, and documentation. Additional verifications ensure marking permanence and flexibility. Passing all confirms the RHZ1-2OL(S)-AL Medium Voltage Power Cable's special fire retardancy, low smoke zero halogen properties, electrical integrity, and suitability for critical medium voltage applications in public or confined spaces.
Application
Perfect for medium voltage distribution in high-risk venues like metro systems, theaters, hotels, data centers, and commercial complexes requiring special fire-retardant LSZH and higher CPR ratings. Commonly installed indoors or underground for superior protection and low smoke emission in densely populated environments.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
Wires and Cables packaging (1)
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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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