Description
The polymers used for the insulation of underground MV cables are either the PRC or the EPR. PRC is used in most applications while EPR is used for very specific applications (MV flexible cables for example).
Underground MV cables come in three forms:
- unipolar cables,
- three-core cables,
- Twists (three unipolar cables assembled).
EVERWELL CAMEROON CABLES AND ENGINEERING SA manufactures cables that meet the requirements of its customers, both in performance and quality.
Use
The cables IEC 60502-2 or NF C 33-220 are intended for medium voltage public distribution MV 12/20 kV.
They consist of 1 unreinforced phase conductor. A semiconductor ribbon is placed under the copper screen
Insulation
The crosslinking process of polyethylene guarantees: excellent resistance to temperature (90 ° C)
- high mechanical strength
- excellent resistance to short circuits (250 ° C)
- very good resistance to cold
Manufctural features
- Shape of the coreCircular
- Flexibility of the coreWired class 2
- Internal semiconductor materialExtruded semiconductor
- InsulationXLPE (chemical)
- Surface semiconductor materialExtruded peelable
- ScreenCopper ribbon
- Material constituting the longitudinal seal Any
- Color of the sheathBlack
Electrical characteristics
Rated operating voltage Uo/U (Um) 12/20 kV
Thermal resistivity of the insulation 3,5K*m/W
Relative permitivity of insulation 2,5
Loss factor (max tan∂ =) 40E-04
Mecanical characteristics
Mechanical resistance to shocks good
Cables flexibility Rigid
Usage characteristics
Maximum temperature on the core 90°C
Maximum temperature on the core in short circuit 250°C
Weather resistance good
Use
The cable IEC 60502-2 or NF C 33-220 is intended for public distribution medium voltage HTA 18/30 kV.
It consists of 1 non-armed phase conductor. A semiconductor ribbon is placed under the copper screen.
Insulation
The crosslinking process of polyethylene guarantees:
- excellent resistance to temperature (90 ° C)
- high mechanical strength
- excellent resistance to short circuits (250 ° C)
- very good resistance to cold
Manufctural features
- Shape of the core Circular
- Flexibility of the core Wired class 2
- Internal semiconductor material Extruded semiconductor
- Insulation XLPE (chemical)
- Surface semiconductor material Extruded peelable
- Screen Copper ribbon
- Material constituting the longitudinal seal Any
- Color of the sheath Black
Electrical characteristics
Rated operating voltage Uo/U (Um) 18/30 kV
Thermal resistivity of the insulation 3,5K*m/W
Relative permitivity of insulation 2,5
Loss factor (max tan∂ =) 40E-04
Mecanical characteristics
Mechanical resistance to shocks Good
Cables flexibility Rigid
Usage characteristics
Maximum temperature on the core 90°C
Maximum temperature on the core in short circuit 250°C
Weather resistance Good
Use
The NF C 33-226 cable is intended for medium voltage public distribution MV 12/20 kV. It is classified as AD8 (fresh water <0.2 bar), AF2 and AN3 in the sense of standard NF C 13-200. The outer sheath of the cable is termite resistant.
Description
It can consist of 3 phase conductors assembled in twist.
Installation conditions
- Depth of laying: 0.80 m
- Soil thermal resistivity: 1.2 ° K m / W
Variants
We are able to supply on request NF C 33-226 type cables with the following variants:
- Copper core
- Different voltage
- Different section
- Earth conductor
- Reinforced thickness aluminum screen
- Twist
- Polyethylene protection for Direct Degradability (EDR) in twist.
Insulation
The crosslinking process of polyethylene guarantees:
- excellent resistance to temperature (90 ° C)
- high mechanical strength
- excellent resistance to short circuits (250 ° C)
- very good resistance to cold
Manufctural characteristics
- Insulation XLPE (chemical)
Electrical characteristics
Rated operating voltage Uo/U (Um) 12/20 kV
Mecanical characteristics
Mechanical resistance to shocks AG4
Usage characteristics
Ambient temperature range during installation -10°C to 50°C
Non flame propagating C2, NF C 32-070
Weather resistance AN3 / AF2
Use
The NF C 33-226 Direct Reinforced Behavior (EDR) cables are intended for medium-voltage public distribution MV 12/20 kV. The direct enterability function is provided by an additional polyethylene sheath extruded above the phase.
The cables are classified as flame retardant according to NF EN 60332-1-2. They are also classified as AD8 (fresh water <0.2 bar), AF2 and AN3 according to standard NF C 13-200.
The outer sheaths of the cables are resistant to termites.
Description
It can consist of 3 phase conductors assembled in twist.
Installation conditions
- Depth of laying: 0.80 m
- Soil thermal resistivity: 1.2 ° K m / W
Variants
We are able to supply on request NF C 33-226 type cables with the following variants:
- Copper core
- Twist
Manufctural characteristics
- Insulation XLPE (chemical)
Dimensional features
Thickness of the screen 150µm
Electrical characteristics
Rated operating voltage Uo/U (Um) 12/20 kV
Mecanical characteristics
Mechanical resistance to shocks AG4
Usage characteristics
Ambient temperature range during installation -10°C to 50°C
Non flame propagating C2, NF C 32-070
Weather resistance AN3 / AF2
