Nota Terkini

Thursday, February 18, 2010

[Science Form 3] Transmission & Distribution

  • The electricity distribution system includes:

    • National Grid Network, which carries electricity to the main substation
      • Consists of a network of cables that carries electricity with a voltage of 66kV, 132kV or 275kV
      • It connects all the power stations in our country.

    • Transformer station

    • Switch zone, which is located in various places
      • It is equipped with circuit breakers to automatically cut off the circuit if a short circuit occurs.

    • Main substation, where voltage is lowered by a step-down transformer to 33kV
      • This high voltage is supplied to heavy industries like vehicle manufacturing factories.

    • Substation branches, where voltage is lowered by a step-down transformer to 11kV
      • This is supplied to light industries like electronic factories.

    • The voltage to housing estates is 240V.

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