Building electrical services: Large buildings supplied at medium voltage require a substation/mini-sub. What is the main item of equipment contained in such a substation? Choose the correct device.

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Concept The heart of a building substation is the MV→LV transformer, stepping medium voltage (e.g., 11 kV) down to low voltage (e.g., 400/230 V). Switchgear, protection, and meters accompany it, but the transformer is the central item. Final Answer …

Building electrical services: Large buildings supplied at medium voltage require a substation/mini-sub. What is the main item of equipment contained in such a substation? Choose the correct device.

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