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Publication of GB1081855ApublicationCriticalpatent/GB1081855A/en
H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
H02J3/00—Circuit arrangements for AC mains or AC distribution networks
H02J3/04—Circuit arrangements for AC mains or AC distribution networks for connecting networks of the same frequency but supplied from different sources
Drehstromtransformator oder -drossel mit isoliertem Nullpunkt und im offenen Dreieck geschalteter Hilfswicklung mit daran angeschlossener Frequenzweiche