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XLPE Insulated PVC Sheathed Cables
Cross linked polyethylene (XLPE) is a thermosetting material obtained by forming cross linkages in polythene molecules. In the past two decades PVC had been the preferred material for Insulating cables. It suffered from inherent disadvantages beacuse of thermoplastic nature. This restricted the maximum operating temperature of the conductor and ability to withstand thermal overloads. It also has higher dielectric loss which makes its use uneconomical in cables.
Technical Advantages of XLPE vis-a-vis PVC
Higher Current rating
Higher short circuit rating(approx 1.2 times than PVC)
Higher insulation resistance(1000 times more than PVC insulating cables)
Higher resistance to moisture(1000 times more than PVC)
Better resistance to surge currents
Has better resistance to most chemicals, oils and acids etc.
Low dielectric losses
Better resistance to chemicals and corrosive gases etc.
Has better resistance to most chemicals, oils and acids etc.
Low dielectric losses.
Better resistance to chemicals and corrosive gases etc.
Comparatively higher cable operating temperature 90o C and short circuit temperature of 250o C smaller bending radius.
Commercial Advantages
Lower laying cost because of comparatively smaller diameter of cable and lighter weight.
Requires less size of cable tray/supports
One size lower cable can be used as compared to PVC insulated cables.
Longer service life.
FRLS XLPE CABLES
XLPE cables can also be used with FRLS PVC sheathing to meet flame retardant low smoke properties.
