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H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
H01H47/007—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current with galvanic isolation between controlling and controlled circuit, e.g. transformer relay
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CH279450D1949-07-211949-07-21Einrichtung zur Steuerung von elektrischen Starkstromgeräten mit Hilfe von Schwachstromsteuerkreisen.
CH279450A
(de)
Schalteinrichtung zum Anschluss von intermittierend arbeitenden Gleichstromverbrauchern an Wechselstromnetze ueber Ventilapparate, insbesondere Quecksilberdampfgleichrichter
Einrichtung für die selbsttätige, von der Stromart des Fahrnetzes abhängige Steuerung der Hauptschalter eines elektrischen Triebfahrzeuges zum wechselweisen Betrieb an Gleich- und Wechselstromnetzen.