A device for connecting a vsc converter to a source of alternating voltage
CA 2228397 C · Owner: Abb Ab · Inventors: Svensson, Kjell; Palsson, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for connecting a VSC converter to a source of alternating voltage having multiple phases through a plurality of inductances. The VSC converter provides a direct current voltage to a capacitor for a power transmission plant. A first circuit breaker connects the inductances to the source of alternating voltage and selectively interrupts current from each of the multiple phases. An additional circuit breaker is connected between one of the phases of the first breaker and the VSC converter. A resistor is connected across the first circuit breaker for supplying current from the one phase to the additional breaker when the first circuit breaker is in an open condition. A circuit …
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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 March 2, 1998 and granted May 6, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 2, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 2, 2020.
- 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.