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Cu/XLPE/CTS/LSF/SWA/LSF

Uo/U - 6.35/11 kV Standart: BS 7835-2000
Cu conductors* XLPE insulation • Cu screen • LSF sheath • Armour st. wires • LSF sheath
 
The three-core power cables with insulation of cross-linked polyethylene (XLPE) are designed for transfer and distribution of electri­cal power with nominal voltage Uo/U 6.35/11 kV and frequency 49 Hz to 61 Hz in urban and district electrical networks and for electri­cal supply of transformer substations, small and medium industrial plants.
 
Cables are designed with sheath of halogen free materi­als, flame retardant, free smoke emission and corrosion. They are suitable for use in distribution networks, electrical power stations and substations. These cables are for fixed assembly in lines with unlimited difference levels for indoor installations, in cable ducts, conduits and shafts, over shelves and grills and outdoor shelter.
 
Cable construction
Construction
Accordlng to BS 6622-1999
Conductor
Cu or Al stranded compacted, wires according to BS 6360 (lEC 228) class 2
Inner semi-conductive layer
semi-conductive XLPE compound
Insulation
XLPE compound
Outer semi-conductive layer
semi-conductive XLPE compound
Metal screen
-I option - Cu tapes
over each phase laid with
overlap
-II option - Cu cores laid
concentrically
Cable assembly
Three insulated and screened phases are twisted with fillings and tape support
Separating layer
halogen free compound
Armour centrically
steel galvanized wires laid con-
Sheath
halogen free fire retardant compound type LIS 1
Color
red, black
Technical data
Conductor resistance at 20°C
According to BS 6360 (IEC228) class 2
Operating temperature
90°C continuous operation
Overload temperature
130°C /100h per year max./
Short circuit temperature
250°C /5 s max/
Nominal voltage Uo/U:
6.35/11 kV
Highest system voltage Uo/U, no more than
12 kV;
Test voltage
AC (≈) - 15 min Level of partial discharge at 12.5 kV
25.5 kV max   10pC
Bending radius, min Temperature of laying
15xD cable
no less than 0°C
Temperature of exploitation
-30 to 50°C
Flame retardant
According to BS 4066-3
category C
(IEC 332-3 category C)
Force of strain in laying N max.
Al cores- 30*n*S core Cu cores- 50*n*S core where: n is number of cores and S is cross-section of cores in mm
 
Construction data Cu/XLPE/CTS/LSF/SWA/LSF   6.35/11 kV
Number of
conductors and
nominal cross
section
Thickness of insulation
Diameter of
St wires for
armour
Thickness of sheath
Cable diameter approx.
Cu/XLPE/CTS/LSF/AWA/LSF
Mass of
Cu approx.
Mass of
cable
approx.
N x mm2
mm
mm
mm
mm
kg/km
kg/km
Uo/U 6.35/11kV
 
 
 
 
 
 
3x25rm
3.4
2.5
2.4
48.8
850
4200
3x35rm
3.4
2.5
2.5
51.6
1140
4900
3x5Orm
3.4
2.5
2.6
54.6
1560
5600
3x70rm
3x95rm
3.4
3.4
2.5
2.5
2.7
2.8
58.5
62.6
2140
2855
6500
7500
3x120rm
3.4
2.5
3.0
66.6
3570
8500