Three-phase power distribution network communication system
First Claim
1. A communication system for a three-phase power distribution network, comprising:
- a plurality of remote devices, certain of said remote devices being signal repeaters;
means for providing an outgoing communication signal intended for at least one of said remote devices;
a plurality of interconnected three-phase power line conductors;
first means for independently coupling certain of said three-phase conductors to said means for providing said outgoing communication signal such that each phase conductor carries an identical phase-related outgoing communication signal;
second means for independently coupling at least two of said three-phase conductors to each of said signal repeaters;
and wherein each of said signal repeaters includes means for producing a composite signal in response to the coupled signals, and includes means responsive to said composite signal, andthird means for independently coupling at least one of said three-phase conductors to each of said other remote devices.
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Accused Products
Abstract
A communication system for a three-phase power distribution network is comprised of a plurality of remote devices, with certain of the remote devices being used as signal repeaters. Injection point circuitry provides an out-going communication signal which is coupled to the three-phase conductors such that each phase conductor carries an identical, independent, outgoing communication signal. The signal repeaters are each coupled to at least two of the three-phase conductors. Each signal repeater includes circuitry for producing a composite signal in response to the coupled signals. The composite signal has a signal-to-noise ratio typically superior to, but not worse than, the signal-to-noise ratio of the best of the coupled signals. The remainder of the remote devices are independently coupled to at least one of the three-phase conductors so as to facilitate communication with each of the remote devices.
108 Citations
12 Claims
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1. A communication system for a three-phase power distribution network, comprising:
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a plurality of remote devices, certain of said remote devices being signal repeaters; means for providing an outgoing communication signal intended for at least one of said remote devices; a plurality of interconnected three-phase power line conductors; first means for independently coupling certain of said three-phase conductors to said means for providing said outgoing communication signal such that each phase conductor carries an identical phase-related outgoing communication signal; second means for independently coupling at least two of said three-phase conductors to each of said signal repeaters; and wherein each of said signal repeaters includes means for producing a composite signal in response to the coupled signals, and includes means responsive to said composite signal, and third means for independently coupling at least one of said three-phase conductors to each of said other remote devices. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification