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CuwXLPE/CWS/PE-wb AlwXLPE/CWS/PE-wb

Uo/U - 6.35/11 kV; 19/33 kV BS 7870 - 4.10
The single-core cables with insulation of cross-linked polyethylene (XLPE) and longitudinal water-blocking elements are designed for transfer and distribution of electrical power with nominal voltage Uo/U 6.35/11 and 19/33 kV and frequency 50 Hz in urban and district electrical networks and for electrical supply of transformer's substations, small and medium industrial plants. 
 
They are suitable for use in distribution installations, electric power stations and industrial systems. The cables are for fixed assembly in lines with unlimited difference levels, indoor installations, in cable ducts, conduits and shafts, over shelves and grills directly underground in ditch and outdoor shelter.
 
Cable construction
Construction
According to BS 7870-4.10
Conductor with
water resisting 

 
Cu and Al stranded compacted,
element according to IEC 60228 class 2 
and BS 6360 with water powder absorbing
Inner semi-
conductive layer
 semi-conductive XLPE compound
Insulation
XLPE compound
Outer semi-
conductive layer
 semi-conductive XLPE compound
Water resisting
element
Layer of semi-conductive water
absorbing tapes
Metal screen

  
Cu wires concentrically laid and
one contact of Cu tape with
thickness of 0.1mm.
Water resisting
element
-I option - water absorbing
insulating tape
Sheath 

 
PE compound
type MDPE according
to BS 7870
Color
 
For 11kV - Red
For 33kV - Black
Technical data
Conductor resistance at 20°C
According to IEC60228 class 2 and BS 6360
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:
6.35/11kV 19/33kV
Highest system voltage Uo/U, no more than
6.35/11; 19/33 kV 12kV;     36kV
Test voltage AC (≈) - 15 min
6.35/11;      19/33kV 25.4kV;       76kV
Level of partial discharge
at 2*Uo
Bending radius, min
Temperature of laying
max. 10 pC
15x D cable
no less than -5°C
Temperature of exploitation
-30 to 50°C
Tests
according to BS 7870-4.10
Force of strain in laying N , max.
Al cores - 30*n*S core Cu cores - 50*n*S core where:
n- number of cores and -S-cross-section of conduc­tors in mm