Medium voltage cables with XLPE insulation are manufactured with most recent technology of insulation in triple extrusion under simultaneous application of semi-conductive layers over insulation (triplex extrusion).
Cross-linking of insulation is done by dry cured vulcanisation procedure in a neutral nitrogen gas. By those procedures we obtain a high quality and tight connection between insulation and conductive layers without the possibility of their separation during the heating and cooling cycles of cables in operation. Cross-linking in nitrogen increases the resistance of insulation towards appearance and spreading of "treeing" and thereby also of partial discharge, increasing thus considerably the grade of dielectric strength of insulation and prolonging the life-time of cables.
ELKA has got a proper development centre and test laboratories for materials and cables with up to date equipment and highly-qualified staff, that guarantees a high quality of final products, materials and cables.
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