Development of automatic switching equipments in the United States and Europe

Chester Lichtenberg: Since its development in 1914 the automatic station has been a very interesting topic to electrical engineers. The development has been very rapid. For example, in the United States today more than one-third of the entire switchboard output of the large manufacturing companies is automatic switchboard equipment for power stations and substations. Our records indicate that over 2,000,000 kw. of rotating apparatus are under automatic control and over 6,000,000 kw. of feeders and transformers are in automatic station service.