Electronic trip device comprising a correcting device
CA 2095994 A1 · Owner: Piney, Philippe · Inventors: Fraisse, Didier; Dupuis, Yves; Piney, Philippe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The trip device comprises an elactronic processing unit (7) which gives a tripping order (D) in terms of the rms value of the current measured (Im) by current transformers and of the threshold (S) and time delay (T) setpoints. The non linearity of response of the transformers is corrected by a device (9) which modifies the current, threshold, or time delay values. These corrected values (Ic Tc and Sc) enable precise trippings to be achieved in compliance with the valuesof the current flowing in the circuit breaker. The type of correction is adapted to the circuit breaker rating by parameters (11) obtained by means of tests and, previously stored in a device (10). (Figure 3).
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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 May 11, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 11, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 11, 2015.
- 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.