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  1. Larger buildings may be supplied with a medium voltage electricity supply, and will required a substation or mini-sub. What is the main item of equipment contained in these?

    2. A.

     Transformer
    B.

     Transponder
    C.

     Transducer
    D.

     Converter

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    Answer : Option A

    Explanation :

    The transformer is used to transform a medium voltage supply to a low voltage supply, e.g. from 11 000 V to 400 V. A transformer is rated in KVA, kilo-Volt-Amps, which is a measurement of electrical power.

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