Microprocessor-based stand-alone digital protective relay for power transformers
CA 2018938 C · Owner: Yalla, V.V.S. Murty · Inventors: Hermanto, Ivi; Yalla, V.V.S. Murty; Rahman, M. Azizur
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stand alone protective apparatus and method is provided for electrical power devices. Power, devices can be damaged due to conditions for example of over current magnetizing in rush-current, over excitation voltage saturation, ground fault or internal faults. To protect power devices from, the noted conditions electrical current of the power device is sensed and sampled. Digital, processing is used for analyzing the digitally coded sample current and based on one of the, conditions that can cause damage a signal is provided for selectively , actuating by tripping an, electric/electronic circuit breaker.
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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 June 13, 1990 and granted January 8, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 13, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 13, 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.