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LT XLPE CABLES |
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XLPE CABLES
The XLPE insulated heavy duty cables were introduced worldwide in mid sixties. These cables have overcome the Limitations of
PVC insulated cables, such as thermal degradation, poor moisture resistant and thermoplastic in nature.
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| The adventure of LTXLPE insulated cables in comparison to PVC insulated cables are as under: |
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| Technical Advantages: |
| • Higher current rating, higher short circuit rating. Approx. 1.2 times that of PVC. |
| • Thermosetting in nature. |
| • Higher insulation resistance to surge currents. |
| • Better resistance to surge currents. |
| • Low dielectric losses. |
| • Better resistance to chemicals & corrosion. |
| • Longer service life. |
| • Comparatively higher cable operating temperature 90 C & short circuit temperature 250 C. |
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| Commercial Advantages: |
| • Lower laying cost because of comparatively smaller diameter of cable & lighter weight. |
| • Requiring less size of cable trays/ supports. |
| • One size lower cables can be used as compared to PVC insulated cable. |
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SELECTION OF POWER CABLES |
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Power cables are generally selected considering the application. However following factors are important for selection of
suitable cable construction required to transport electrical energy from one end to the other. |
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• Maximum operating voltage |
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| • Insulation level. |
| • Frequency. |
| • Load to be carried. |
| • Possible overloading duration & magnitude. |
| • Route length & voltage drop. |
| • Mode of insulation considering installation environment such as ambient & ground temperature
chemical & physical properties of soil. |
| • Flame retardant properties. |
| • Plant safety requirements. |
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All sizes of Polycore XLPE cables are designed to standard operating conditions in India & abroad. The standards adopted are
considering the geographic/ climatic conditions & general applications of power for utilities, distribution & general purposes. |
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The cables are manufactured conforming to Indian & International specification for XLPE insulated cables. Customer specific
requirements can also be met. |
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Polycore manufacturers wide range of cables, it is therefore important that while placing enquiries or orders, as much
information as possible should be furnished, so that the enquiries & orders are dealt quickly & efficiently. |
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PARAMETERS REQUIRED ARE AS UNDER |
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| • Voltage grade – 1100 volts. |
| • Relevant Indian standard– IS-7098 ( Part–1) – 1988 or |
| International standard – IEC-60502 & BS-5467, DIN |
| • Number of cores – Single, two, three & half or four cores. |
| • Conductor – Size, where ever applicable size of reduced natural conductor. |
| • Conductor material – Copper/ Aluminium. |
| • Type of Insulation– XLPE. |
| • Type of inner sheathing – PVC wrapped/ PVC extruded. |
| • Type of armour– Unarmoured/ strip armoured/ wire armoured/ tape armoured. |
| • Type of outer seath – PVC/ flame retardant/ flame retardant low smoke/ zero halogen(LSOH). |
| • Length of cable required & drum lengths. |
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