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General Construction - LT XLPE / PVC Power Cables
‘GEMSCAB’ PVC insulated Cables are manufactured confirming to IS:1554/Part-1/1988 and XLPE Insulated as per IS:7098/Part-1/1988. Conductor The conductor of power cables is made from EC grade aluminium or annealed electrolytic copper. All conductors conform to IS: 8130. The conductors are solid / stranded / compact circular / sector shaped. Insulation In PVC Power Cables the conductor is insulated with the poly vinyl chloride covering over conductor as insulation by extrusion process and In XLPE Power Cables cross linked polyethylene covering as insulation over conductor by extrusion process. For identification of cores the following colour scheme is adopted.
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- LT-XLPE Cables have longer life as compared to conventional PVC Cables.
- LT-XLPE Cables have a higher conductor temperature rating i.e. 90°C
- LT-XLPE Cables have a higher emergency overload capacity 120°C.
- Max. temperature limit under short circuit conditions for LT-XLPE Cables is 250°C
- Hence XLPE Cables have higher short circuit rating.
- Insulation resistance of LT-XLPE Cable is excellent & superior to Identical PVC Cables.
- LT-XLPE Cables have high corrosion resistance in polluted atmosphere.
- LT-XLPE Cables have better properties of resistance to chemical and corrosive gases.
- LT-XLPE Cables have low installation cost because of light weight, dimensions and are far more flexible.
- Jointing of LT-XLPE Cables is easier and quicker.
| FLOW CHART FOR MANUFACTURING PROCESS & QUALITY CONTROL CHECKS FOR XLPE CABLES CONFORMING TO IS:7098(PART-1)1988. |
