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Description
CONSTRUCTION OF CABLES
Conductor:
The conductors made from E.C. grade aluminium wires are stranded together and compacted. All sizes of conductors of single or three core cables for HT cable are circular compacted.
Conductor construction and testing comply to IS 8130-1984 as amended up to date & IEC: 60228.
Cables with copper conductor are also manufactured by GEMSCAB.
Conductor Screening:
Conductor screening is provided for all cables above 3.3 KV grade in the form of an extruded layer of semi conducting extrusion over the conductor.
XLPE Insulation:
High quality XLPE unfilled insulating compound of natural colour is used for insulation. Insulation is applied by extrusion process and is as per IS:7098 / (Part-2) & IEC: 60502.
Insulation Screening:
The cables rated above 3.3 KV are provided with insulation shielding over the insulation. The screening is provided with an extruded layer of semi conducting compound. Over the semi conducting covering, a metallic screen in the form of copper tape is provided.
Core Shielding:
XLPE insulation and insulation shielding are all extruded in one operation by a special process called Triple Extrusion i.e. all three layers in one operation. This process ensures perfect bonding of inner and outer shielding. The bond prevents the formation of cavities at the surface of the conductor when the cable is subjected to bends. The void formation, at the interface of the semiconducting layer and insulation, too is eliminated even during heating and cooling cycles in the operation.
Core Identification:
The Core identification complies with the requirements of
IS-7098 (Part II) as shown below:
By numerals (1, 2, 3) printed on cores.
Conductor:
The conductors made from E.C. grade aluminium wires are stranded together and compacted. All sizes of conductors of single or three core cables for HT cable are circular compacted.
Conductor construction and testing comply to IS 8130-1984 as amended up to date & IEC: 60228.
Cables with copper conductor are also manufactured by GEMSCAB.
Conductor Screening:
Conductor screening is provided for all cables above 3.3 KV grade in the form of an extruded layer of semi conducting extrusion over the conductor.
XLPE Insulation:
High quality XLPE unfilled insulating compound of natural colour is used for insulation. Insulation is applied by extrusion process and is as per IS:7098 / (Part-2) & IEC: 60502.
Insulation Screening:
The cables rated above 3.3 KV are provided with insulation shielding over the insulation. The screening is provided with an extruded layer of semi conducting compound. Over the semi conducting covering, a metallic screen in the form of copper tape is provided.
Core Shielding:
XLPE insulation and insulation shielding are all extruded in one operation by a special process called Triple Extrusion i.e. all three layers in one operation. This process ensures perfect bonding of inner and outer shielding. The bond prevents the formation of cavities at the surface of the conductor when the cable is subjected to bends. The void formation, at the interface of the semiconducting layer and insulation, too is eliminated even during heating and cooling cycles in the operation.
Core Identification:
The Core identification complies with the requirements of
IS-7098 (Part II) as shown below:
By numerals (1, 2, 3) printed on cores.
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Power Cables