Apparatus for monitoring degradation of insulation of electrical installation
CA 2022413 A1 · Owner: Terunaga, Fukuso · Inventors: Saigo, Akira; Sera, Akio; Maezawa, Shigenari
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
According to the invention there is provided an, apparatus for monitoring degradation of insulation of an electrical installation that can constantly monitor its electric equipments and cables for degradation of insulation under hot-line conditions. Said apparatus comprises: a first sensor for detecting a progressive wave generated by a partial discharge taking place at a location where the insulation is degraded in the power transmission paths:, a second sensor for detecting the phase of said generated progressive wave as well as external noise; a third sensor for detecting a reference signal for determining the direction of said progressive wave: and a measurement section for processing …
Read the whole patent
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
- Filed July 31, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 31, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.