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Standard for selection of cable cross sections

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  • Power Cable

    Power Cable

    Power cables are mainly used for power transmission and distribution purpose. It is an assembly of one or more individually insulated electrical conductors, usually held together with an overall sheath. The assembly is used for transmission and distribution of electrical power. Electrical power cables may be installed as permanent wiring within buildings, buried in the ground and run overhead or exposed.……Including: rubber cable, welding cable, URD cable, XLPE insulated power calbe etc.

  • Bare Overhead Conductor

    Bare Overhead Conductor

    Bare Overhead Conductors are used in overhead transmission and distribution network applications.They are also used for un-insulated hook ups, jumpers, grounding conductors and other applications. Our Conductors conform to ASTM, IEC, BS, BS EN and DIN standards.…… Including: AAC conductor, AAAC conductor, ACSR conductor, ACAR conductor, AACSR conductor, etc.

  • Aerial Bundled Cable

    Aerial Bundled Cable

    Aerial bundled cables (also aerial bundled conductors or simply ABC) are overhead power lines using several insulated phase conductors bundled tightly together, usually with a bare neutral conductor. Our abc calbe conform to ASTM, IEC, SANS standards.……Including: abc cables, cvered line wire, service drop wire etc.

    • cable cross sections
    In order to make the power supply safe, reliable, economical and reasonable, the section of the conductor shall be determined according to the following principles:
     
    (1) according to long time allowing the load current conductor to select cable cross sections. To allow the conductor work under the maximum load without overheating, that is, the conductor is not allowed to exceed allowing temperature for long time.
     
    (2) according to allow voltage loss of conductor to select cable cross sections. To ensure that the power supply is supplied with sufficient voltage to ensure the power supply quality.
     
    (3) according to economic current density of conductor to select cable cross sections. The minimum annual operating cost of the transmission line is to achieve the goal of economic power supply.
     
    (4) according to the mechanical strength of conductor to select cable cross sections. To avoid the operation or installation of the line, or because of the pressure and damage, to ensure the safe operation of power supply.
     
    (5) according to thermal stability conditions of short circuit conductor to select cable cross sections. When wire through the short circuit current, the conductor can not exceed the short time temperature.

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