6kV - 35kV Medium Voltage Cable 3c X 95mm 120mm 150mm 185mm 240mm 300mm 400mm MV Power 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
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
GB/T12706.2-2020, GB/T 12706.3-2020
SPECIFICATION
|
Specs
mm²
|
Conductor diameter
mm
|
Outer thickness of insulation
±1.0mm
|
Approx outer diameter of cable
mm
|
Approx cable weight
kg/km
|
|
3×35
|
6.6±0.2
|
20.0
|
54.1
|
3935
|
|
3×50
|
7.6±0.2
|
21.0
|
56.6
|
4480
|
|
3×70
|
9.2±0.2
|
22.6
|
60.2
|
5336
|
|
3×95
|
10.9±0.2
|
24.3
|
64.2
|
6387
|
|
3×120
|
12.2±0.2
|
25.6
|
67.3
|
7326
|
|
3×150
|
13.6±0.2
|
27.0
|
70.6
|
8340
|
|
3×185
|
15.2±0.2
|
28.6
|
74.5
|
9705
|
|
3×240
|
17.4±0.2
|
30.8
|
81.0
|
12490
|
|
3×300
|
19.5±0.2
|
32.9
|
85.9
|
14635
|
|
3×400
|
22.0±0.2
|
35.4
|
91.9
|
17515
|
|
3×500
|
24.8±0.2
|
39.0
|
100.2
|
21345
|
|
3×630
|
28.2±0.2
|
42.4
|
108.1
|
26055
|
FACTROY
PACKAGE
PROJECTS
APPLICATION
FAQ
Q: What are the core configurations for 3-phase power transmission?
A: Common options include:
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.
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