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Typically the power rating of a sub-station is in Watts.

A standard transformer may be 55kva or 55,000 volt amps.

Volt amps is the formula for Watts. (V times A equals Watts)

Standard home usage is in the neighborhood of 3kw per hour.

So a sub-station with three 55kva tranformers might handle 60 homes.

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13y ago

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