Product Specification

6kV to 35kV 3-Core MV Power Cable, Armored Medium Voltage Cable

APPLICATION

Medium voltage 3-core cables (typically rated from 6 kV to 36 kV) are widely used in power distribution networks due to their balanced phase loading, compact design, and enhanced reliability compared to single-core alternatives.

• Urban & Industrial Distribution:Deployed in substations, factories, and commercial complexes to transmit power with reduced electromagnetic interference (EMI).
• Preferred for underground installations where space constraints exist.
• Renewable Energy Projects:Connects wind turbines and solar farms to the grid, leveraging aluminum or copper conductors for high conductivity.
• Mining & Offshore Operations:Armored versions (e.g., SWA) provide mechanical protection in harsh environments, while XLPE insulation ensures moisture resistance.
• Public Infrastructure: Used in tunnels, railways, and airports with flame-retardant jackets (LSZH) for fire safety compliance.

CONSTRUCTION

Conductor: Round compacted conductors 

Conductor Shield:  Semi conductive shielding material (below 500mm)  Semi conductive tape+semi conductive shielding material (500mm and above)

Insulation:  Polyvinyl chloride (PVC) 

Insulation Shield: Peelable semiconducting shielding material 

Metal Shield Layer: Copper Tape   Copper Wire(35kV 500mm above) 

Filler: Polypropylene(PP) mesh filling rope 

Binder Tape: Non hygroscopic straps

Armouring: Steel Tape(Single core)   Galvanized steel tape(3 core)

Outer sheath: 90℃ Polyvinyl chloride (PVC)

CHARACTERISTICS 

Voltage Rating Uo/U

3.6/6(7.2)kV,  6/6(7.2)kV,6/10(12)kV,  8.7/10(12)kV,

8.7/15(17.5)kV,  12/20(24)kV,  18/20(24)kV,

18/30(36)kV, 21/35(40.5) kV, 26/35(40.5)kV 

Available Conductor Cross-Sections
95mm² | 120mm² | 150mm² | 185mm² | 240mm² | 300mm² | 400mm²

Temperature Rating

Maximum operating temperature of conductor:+90℃

Operating ambient temperature: -15℃~+55℃

Cable laying temperature:Not less than 0℃(When the ambient temperature is below 0℃, the cable should be preheated.) 

Minimum Bending Radius

Single Core 15D

Three Core 12D

(D is the actual outer diameter of the cable)

STANDARD

IEC 60502-2, BS 6622 / BS 7870, GB/T 12706.2

SPECIFICATION

FACTROY

PACKAGE

PROJECTS

APPLICATION

FAQ

Q: What are the core configurations for 3-phase power transmission?

A: Common options include:

• Three single-core cables (installed in trefoil or flat formation)

• One 3-core cable with shared armor (cost-effective for shorter runs).

Q: How to select cable cross-section for a given current load?

A: Use the formula:
[ I = frac{P}{sqrt{3} times V times cosphi} ]
Where I is current, P is power, V is voltage, and (cosphi) is power factor. Consult IEEE 835 for derating factors.

Q: . What is the maximum allowable bending radius?

A: For steel-wire-armored (SWA) cables, the minimum bending radius is 12× cable diameter (dynamic) or 6× (static).

Q: . Can armored cables be used in underground ducts?

A: Yes, but ensure duct sizing allows for bending radius and consider earth fault current path. Non-metallic ducts may require additional earthing.

Q: . How to terminate armored MV cables?

A: Use armor clamping kits and stress cones for XLPE cables. Follow manufacturer guidelines to avoid corona discharge.

Q:. What maintenance is required for armored MV cables?

• Annual IR testing (insulation resistance >1000 MΩ/km)

• Thermal imaging to detect hotspots

• Armor integrity checks for corrosion.

Q: . Are there environmental restrictions for installation?

A: Avoid direct sunlight for non-UV-resistant jackets. For wet conditions, specify water-blocking tape or lead sheath.