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Medium/High Voltage Production Facility

Medium/High Voltage / Extra High Voltage Cables Production Facility

High voltage cables, which are preferred by today's users in isolation and produced using XLPE material, offer solutions that contribute to the conversion of energy losses into profit with their performance. HES High Voltage Cables provide the transmission of high voltage electrical energy needed by industry and large residential areas in many countries of the world.

While the isolation process of the high voltage cables produced by the CV method is carried out in a completely closed environment, the cross-connection process of the XLPE material is carried out at the same time. HES Cable both shortens the production time and prevents the change of quality depending on external factors by performing all the slings from raw material input to cabling in high voltage cables in the same facility. HES Cable performs analyses and controls of products with modern devices at every stage of production in order to maintain its high standards of quality and safety in high voltage cables. The products whose production is completed are made ready for shipment after the final tests are carried out.

General Information on the Production Facility

Medium, High and Extra High Voltage Power Cable Production Facilities, which were started to be constructed in 2000, have the latest technology as well as being an integrated facility. All operations from the introduction of the wire into production to the exit of the wire as cable take place in the same facility. Thus, a meticulous and continuous quality control is carried out in both raw material and production stages. Producing in accordance with TSE and VDE and other international quality standards, HES Cable has expanded its product range with this new product.

HES XLPE Medium and High and Extra High Voltage Energy Cables, which can be used comfortably and safely underground, prevent energy leakage and enable energy losses to be converted into earnings. In insulation, XLPE material, which is the choice of today's cable users, is used. The outstanding features that XLPE brings to the product can be listed as follows:

High resistance to chemicals - High mechanical resistance:

  • Resistance to repetitive bends
  • High thermal endurance and long life
  • Resistance to large temperature variations.
  • Tensile force exceeding 25N/mm2 and elongation of break over 400%
  • Continuous current carrying capacity and high short-circuit strength

Since the density is low and the insulation resistance is high, the external diameter of the cables is lower and their weight is lighter. It also does not have water absorption feature.

Production is carried out by CV (Continuous Vulcanizing) method:

In the CV method, insulation of medium and high voltage energy cables with aluminum and copper conductors, lower and upper semiconductor layers are discarded at the same time. Insulation materials are supplied in vacuum packages and are extruded using fully automated transport, loading and drying systems.

In this method, the insulated cable is passed through a hot pressure tube containing nitrogen gas. The tube temperature is between 200 – 450 °C and the tube pressure is approximately 10 bar. By this method, a new chemical structure is created by adding Peroxide (catalyst) to the polyethylene. Polyethylene molecules are separated and their molecular bonds are strengthened. In this process, the formation of insulation gives a graph depending on temperature and time. As a result of this reaction, the thermoplastic material is transformed into thermoset material. After this stage, the cable is cooled with the help of water or nitrogen gas and then rolled up to atmospheric pressure.