Qifan Cable is a professional MV cable specialist, offering a full range of medium voltage cables, a dedicated testing laboratory and expert technical & regulatory support.
Medium voltage cables come in numerous structural forms, follow multiple standard specifications and employ different material solutions. For project-specific cable selection, it is essential to weigh performance needs, installation conditions and environmental challenges, and ultimately ensure full compliance with cable standards, industry rules and regulatory requirements.
Medium Voltage Cable Standards & References:
| MV Cable Standard | Voltage Range |
| IEC 60502-2 | Cables with extruded insulation with voltage rating between 6kV and 30kV |
| BS 6622 | Armoured cable with PVC outer sheathing and voltage rating from 3.3/6kV to 19/33kV – AWA single core, SWA multicore. |
| BS 7835 | Armoured cable with LSZH outer sheathing and voltage rating from 3.3/6kV to 19/33kV – AWA single core, SWA multicore. |
| NFC 33-226 | Cables with rated voltages between 6/10(12) kV and 18/30(36) kV, with cross-linked polyethylene insulation and fixed gradient, for distribution networks. |
| HD620 | Cables with extruded insulation and voltage ratings 3.6/6 (7.2)kV to 20.8/36 (42)kV (often seen in conjunction with IEC60502-2) |
| ANSI/ICEA S-94-649 | Underground electrical distribution cables rated between 5 kV and 46 kV |
| AS/NZS 3808 | Power cables for rated voltages 1kV to 33kV |
| DIN VDE 0276 Part 620 | Distribution cables of nominal voltages 3.6kV to 20.8/36kV |
| AS/NZS 1429.1 | Cables with extruded insulation and voltage ratings 3.6/6(7.2)kV to 19/33(36)kV |
| MV Cable | MV Cable Description |
| N2XSY/NA2XSY | Single core Copper (N) or Aluminium (NA) XLPE/PVC cables in accordance with HD620 10C and IEC60502-2. Available as 3-core variants under references N2XSEY. |
| N2XS(F)2Y/NA2XS(F)2Y | Single core Copper (N) or Aluminium (NA) XLPE/PE cables with additional waterblocking (F) tape/screen, in accordance with HD620 10C and IEC60502-2. |
| N2XS(FL)2Y/NA2XS(FL)2Y | Single core Copper (N) or Aluminium (NA) XLPE/PE cables with both longitudinal waterblocking (F) and laminated moisture barrier (L) to prevent moisture ingress. |
| MV-90 | Medium Voltage power cables designed for use up to 35kV (5kV to 35kV range), certified under UL 1072 with a maximum continuous conductor operating temperature of 90°C. |
| MV-105 | Medium Voltage power cables designed for use up to 35kV (5kV to 35kV range), certified under UL 1072 with an elevated maximum continuous conductor operating temperature of 105°C. |
Medium Voltage Cable Construction:
Construction will be influenced by the installation parameters, with optional additional component layers providing environmental protections, but it will include the following:
| MV Cable Construction | MV Cable Materials |
| Conductor | Copper or Aluminium – Class 1 solid, Class 2 stranded (circular, circular compacted, sectorial). Some flexible MV cables for dynamic equipment also available. |
| Optional: Conductor Waterblocking | Swellable powders or swellable yarns in stranded interstices |
| Conductor Screen | Semi-Conductive Layer |
| Insulation | XLPE (Cross-linked Polyethylene) or EPR (Ethylene Propylene Rubber) |
| Insulation Screen | Semi-Conductive Layer |
| Optional: Waterblocking – Longitudinal | Swellable powders or tape |
| Metallic Screen | Copper Wires and/or Copper Tape (around individual cores) |
| Optional: Waterblocking – Longitudinal | Swellable Tape |
| Optional: Inner Sheath | Applied where Armour is also applied. PVC or LSZH compound |
| Optional: Armour | Single Core: Aluminium Wires / Tape Multi-Core: Galvanised Steel Wires / Tape (Wires can be circular or flat, tapes can be single or double layer flat or corrugated) |
| Optional: Waterblocking – Radial | Aluminium/PET Tape with the aluminium side tightly bonded to outer sheath |
| Outer Sheath | LDPE, MDPE (Low/Medium Density Polyethylene), PVC (Polyvinyl Chloride), LSZH (Low Smoke Zero Halogen). Additives to offer resistance to UV, oils & greases, water, flames, termites, and other environmental factors can be added as required. |
Medium Voltage Cable
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Designed with enhanced protection for demanding environments, Medium Voltage (MV) cables are widely utilized for outdoor installations and severe weather conditions. Their typical applications span renewable energy (wind farms and solar PV plants), mobile substations, transformers, and generator sets. They also power heavy-duty industrial and mining settings, supply public transportation infrastructures like train and metro lines, and distribute power to isolated areas. Furthermore, they facilitate scheduled maintenance downtime and enable weather-proof underground networks to prevent storm disruptions. Given their diverse configurations and standards, it is essential to verify that the selected MV cable perfectly matches the specific environmental challenges and performance requirements of your installation.
Current-carrying conductor: Copper or aluminum
Inner semiconductive shield: Semiconductive polymer
Main insulation: Fixed-gradient cross-linked polyethylene (XLPE, the core material specified in your document)
Outer semiconductive shield: Semiconductive polymer (to stabilize the electric field gradient)
Metallic shielding layer: Copper tape or copper wires
Outer protective sheath: Polyethylene (PE) or PVC plastic
Medium-voltage cables are mainly used in public power distribution networks, including urban underground power lines, industrial plants, large commercial buildings, renewable energy power stations and connections between substations.
Operates within the voltage range of 1kV to 33kV
Manufactured with advanced insulation such as XLPE or PVC
Features high mechanical strength and resistance to heat and environmental stresses.
Can be installed underground, overhead, or on cable trays.
Medium voltage power cable solutions are trusted across multiple sectors due to their versatility.
Selecting the proper medium voltage power cable offers many benefits:
High efficiency: Transmits electricity with minimal losses.
Durability: Engineered to withstand mechanical stress and harsh environments.
Flexibility: Can be installed in overhead, underground, or tray-based systems.
Long service life: Reliable operation for decades with proper installation.
Safety Compliance: Designed to comply with global electrical safety standards.
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