Coordination arrangement for protective devices in electrical systems
CA 2080673 C · Owner: S&C Electric Company · Inventors: Bellei, Terrance A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An arrangement to coordinate protective devices is provided by defining operation of, the instantaneous characteristic portion of an upstream protective device to coordinate with a, downstream current-limiting fuse based on the peak let-through current of the downstream, current-limiting device, with instantaneous operation being set to occur only above the peak, let-through current of the downstream current-limiting fuse. Accordingly for , fault currents, which are seen by both the instantaneous device and the current-limiting device and that are, within the ratings of the current-limiting device the upstream device will , not respond and the downstream current-limiting fuse will …
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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 October 15, 1992 and granted August 19, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 2014.
- 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.