Russia is a massive country spanning nine time zones from east to west Extensive electrification programs conducted in the 1950s, 1960s and 1970s supplied electricity to rural and urban areas. Similar to other European distribution systems, Russia typically uses an ungrounded, three-wire, 6- or 10-kV radial distribution system. Feeders are relatively short and, as a result, the Russian scheme has more feeders and medium-voltage substations than a comparable North American system.
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