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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)
Einrichtung zur An- und Abschaltung des Hochspannungstransformators von mechanisch angetriebenen Gleichrichtern, insbesondere fuer Elektrofilteranlagen
Schalteinrichtung zum Anschluss von intermittierend arbeitenden Gleichstromverbrauchern an Wechselstromnetze ueber Ventilapparate, insbesondere Quecksilberdampfgleichrichter