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Head end power
Head end power (also known as hotel power, or Electric train supply (ETS), in British railway terminology) is a method of providing electricity to the carriages of a train, usually the passenger carriages of a long distance 'hotel' train. A generator or alternator in a power car usually provides this power, which then runs through various cabling and connectors along most of the train, but often excluding the locomotives and baggage cars.
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