XLPE is an abbreviation of Cross-linked Polyethylene. This has been recognised worldwide as an excellent dielectric for wires and cables. It first went into commercial production in 1960. Polyethylene which is a thermoplastic material is converted into a thermosetting material by crosslinking, the linear chain structure of polyehtylene into a three-dimensional network structure. Through this transformation, the thermal and mechanical properties of XLPE are dramatically improved, while its electrical properties remain unchanged.

The initial cross-linking technology adopted worldwide was the steam curing process. However, it was realised that micro-voids were the inevitable outcome from the steam curing process caused by permeation of moisture into the insulation. In order to overcome this shortcoming, the Nitrogen Gas Curing Process (Dry-Cure process) was introduced in the beginning of 80s. This process dramatically reduced the void content in the insulation.

Nicco's XLPE Cables are manufactured with the latest state-of-the-art technology of Triple Extrusion using Single (Common) Cross Head Etrusion technique and Dry Cure (Intert Gas Cured) Cross-linking process, which have the following noteworthy features and characteristics:

• No irregularities eg. protrusions, disruptions, asperities in the inner and outer semi-conducting layers.
• Uniform 3 layer insulation structure.
• Free from Micro Voids and Moisture content.

Nicco's 66 kV XLPE Cables of various sizes have been successfully Type Tested at Central Power Research Institute (CPRI), Bangalore.

• Worldwide High Voltage XLPE Cables have rapidly replaced the conventional Oil-Impregnate-Paper insulated cables and Gas - Filled cables for the following advantages:

  • Higher Power Transmission Capacity
  • Lower dielectric Losses
  • Maintenance Freedom
  • Independence of route profile and terrain
  • Easier jointing and termination
  • lower installation cost
  • no environmental hazard