Larger buildings may be supplied with a medium voltage electricity supply, and w

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Question
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?
Options
A. Transformer
B. Transponder
C. Transducer
D. Converter

Correct Answer

Transformer

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.