Renovation of the substation for the Skanstull project in Stockholm
In 1919, the South Street substation was opened as a state-of-the-art critical infrastructure to help keep the lights on Rhode Island, the largest city in Providence, the smallest state in the United States. Three 115 kV transmission lines supplied electricity to the substation, which then reduced the voltage and sent it to smaller substations near the state's capital. A typical substation built at that time had six circuits that sent current; There were 48 circuits at the South Street substation.
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