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    General introduction of IEC 60840 high voltage cable

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    The International Electrotechnical Commission’s standard IEC 60840 references the requirements for cables and cable accessories with a voltage rating of between 30kV (Um 36kV) and 150kV (Um 170kV). The cables are of either single core or individually screened three-core cables but, as with the lower voltage standard IEC 60502, it excludes cables for special applications such as submarine and mining.

    These high voltage cables are designed for fixed installations and suitable for the primary distribution of power. These cables have an outer sheath of High Density Polyethylene (HDPE) which offers a balance between abrasion resistance and flexibility.

    To achieve compliance with this international standard, the cables are subject to regular type test sequences, simulated to represent a 30 year service lifetime on a cable sample of at least 1 metre. Unlike in the IEC 60502 Part 2 testing, IEC 60840 sees voltage applied during the burner heating cycles.

    ZMS cable supplies a comprehensive range of British, European and International standard High Voltage (HV) cable. We also provide customised HV cable solutions designed around the applications and the project specific requirements. This may require unusual quantities or lengths, short production lead-times and/or technically challenging constructions.

    The standard high voltage cables, which include 2XS(F)2Y, 2XS(FL)2Y, A2XS(F)2Y and A2XS(FL)2Y are designed for the primary distribution of power on networks with a voltage rating of 123kV. HV cable are triple extruded to the latest IEC standards using proprietary materials on modern catenary line equipment. They are suitable for installations providing mechanical protection to the cable. Waterblocking tape options help ensure that should the HV cable be damaged, the repair lengths and associated works are kept to a minimum. A high density polyethylene (HDPE) is used as standard and offers a compromise between abrasion resistance and flexibility, however various other options are available on request.

    High Voltage / 2XS(F)2Y, A2XS(F)2Y 110kV Power Cable

    Application:

    The high voltage power cables contained within this datasheet are suitable for the primary distribution of power up to a maximum network voltage of 110kV. Suitable for locations where mechanical protection is afforded by other means and where the additional protection of a moisture barrier has been determined not to be necessary, see 2XS(FL)2Y and A2XS(FL)2Y. The cables are triple extruded using proprietary materials on modern catenary line equipment to the latest IEC standards. Water blocking tape options ensure that should the cable be damaged, repair lengths and associated works are kept to a minimum. The cables are provided as standard with a high density polyethylene sheath, chosen to give the best compromise between abrasion resistance and flexibility to ensure installation confidence. The range can be customised to meet specific project demands should the need arise.

    Construction

    Conductor

    Class 2 copper or aluminium conductor, compacted or segment strand Milliken to BS EN 60228 (previously BS 6360)

    Conductor Screen

    Extruded semi-conductive XLPE (Cross-Linked Polyethylene)

    Insulation

    XLPE (Cross-Linked Polyethylene)

    Insulation Screen

    Extruded semi-conductive XLPE (Cross-Linked Polyethylene

    Separator

    Water swellable semi-conductive tape

    Screen

    Copper wire screen, with a counter helix of copper tape Separator Water swellable tape

    Sheath

    HDPE (High Density Polyethylene) (To be specified at time of order. Other options available)

    Characteristics:

    Voltage Rating (Uo/U) (Um) 64/110kV (123kV)

    Highest Network Voltage (Um) 123kV

    Maximum Conductor Temperature In Service

    (Operating temperature-continuous operation) +90°C

    Short Circuit Temperature +250°C

    Overload Temperature +130°C (100h per year maximum)

    Operating Temperature -30°C to 90°C

    Minimum Installation Temperature -20°C

    Sheath Colour Black