Generator protecting relay
CA 1232013 A · Owner: Mitsubishi Denki Kabushiki Kaisha · Inventors: Ebisaka, Toshinobu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A protective relay having an operational boundary matched substantially to the output performance limit characteristics of a generator to enhance the protection thereof is disclosed. The protective relay generates a signal representative of a discriminating impedance based on measurements of the generator's terminal voltage and current. The relay utilizes two pairs of predetermined values which characterize in part the generator's output performance limit curves. Two corresponding pairs of vector signals are generated by the relay based on their respectively corresponding pairs of predetermined values and the generated discriminating impedance signal. The angles between the vector pairs are …
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
- Granted January 26, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 26, 2005.
- 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.