Tap switch for frequency response and partial discharge measurement
CA 2458568 A1 · Owner: Hilal, Nagi · Inventors: Hilal, Nagi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and method for conducting diagnostic services on live electrical equipment, such as electrical power transformers (20) using a tap switch (10) installed into each phase of the transformer (20). The tap switch (10) is used along with the appropriate test and measurement equipment (60) connected to a test and measurement system (40) to perform the diagnostic service when the transformer (20) is live and in-service. The tap switch(10) allows the diagnostic service to be performed without the hazard of disconnecting the bushing tap(21) in order to connect the bushing tap(21) back to the test and measurement equipment (60). The tap switch (10) provides for live diagnostic tests …
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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
- Filed August 16, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 16, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 16, 2024.
- 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.