Copper XLPE Armoured Power Cables.
Xlpe maximum working temperature is 90 and minimum working temperature is 0 c
2X - XLPE insulation W - Copper conductor Y - PVC sheath
it is A- aluminium 2X- XLPE insulated F-flat armoured Y- outer PVC sheath
Its depending on cable dimension, current carring capacity and soil thermal resistivity.
Cross linked Polyethylene (XLPE)
In the context of electrical cables, PVC and XLPE are two materials used as insulation. XLPE has got more capacity to hold on incase of high temperature. XLPE will not deteriorate it's insulating property until it reaches 90 degree celsius. It will not suddenly lose it's insulating property if the themperature jumps just above 90. But the overall life of the cable will be reduced. PVC can withstand temperatures only upto 70 degree Celsius. PVC is cheaper than XPLE, hence it's find it's place in market today. PVC is a thermo plastic where as XLPE is thermosetting plastic. PVC - Poly Vinyl chloride XLPE - Cross linked Poly Ethylene
sioplas is a temperature based curing and ccv is pressure based curing .this is general difference. gulab chand
XLPE = Cross-Linked Polyethelene There are actually two semi-conductive layers on high voltage cable. One is between the actual conductors and the XLPE. The other semi-con is on outside of the XLPE insulation underneath the concentric neutral. The semi-con is used to equalize the electrical stresses over a large area. For example, most conductors are made up of multiple strands of copper or aluminum. The outer edge of the conductor bundle is not smooth. It has several ridges on the outer edge where the individual strands meet one another. These high spots will stress the insulation leading to a premature failure. The internal semi-con makes a smooth voltage level for the XLPE where it meets the conductor strands.
The purpose of the semiconductor over XLPE is to equalize the electrical stresses over a large area.
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as an insulation