Zellweger Uster Ag

Zellweger, Ltd.

Eduard Baumann

Roger Kniel

Candidus A Waldispuhl

In a remote control system which generates a remote control signal by a temporary short-circuit on the secondary side of a transformer during an influencing period or time span about a zero point transition of the alternating-current mains voltage, a considerable improvement in the receiver-side recognition or detection of the remote control signal can be accomplished by a different determination, in relation to the prior art, of the receiver-side comparison period as concerns its start and duration. There is correlated the comparison period to the course of the receiver-side alternating-current mains voltage before the mains voltage zero transition to be monitorerd. This system may be used in remote control technology using signal transmission on a power supply network.

Method and apparatus for signal recognition in a remote control system

A method of and apparatus for automatically isolating a faulty section of a power line, of an electrical supply network, the power line being adapted to be connected to at least one energy source and to be temporarily divided up into sections by switches following the appearance of an excess current, and automatically reconnecting normally operating sections of the power line to at least one energy source, wherein a signal is transmitted from the place of at least one switch, which has opened automatically after an excess current that has passed through it, through a non-faulty part of the power line to at least one other switch, through which at least a part of the excess current had passed to the now opened switch, and which has automatically opened as well, reception of the aforementioned signal being an essential requirement for closing the said other switch.

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Uster, Switzerland

Eduard Baumann