Method and apparatus for monitoring ground faults and isolated electrical systems
CA 1201771 A · Owner: Isolation Systems Limited · Inventors: Arato, Gabor P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for monitoring ungrounded power distribution systems that indicates the total hazard current from the isolated power conductors to ground. A measurement signal having at least two frequency components different from the power system line frequency is applied across the combined fault impedances that occur between the power conductors and ground. Voltage responses to the measurement signal components are separated from the power system line voltage and from each other by frequency selective means. These distinct voltage responses are proportional to the fault admittance magnitude at the different measurement frequencies. The voltage responses are applied to the computational circuit …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 11, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 11, 2003.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.