Switching apparatus and method for varying an impedance of a...

Electricity: electrical systems and devices – Safety and protection of systems and devices – Arc suppression at switching point

Reexamination Certificate

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C361S006000

Reexamination Certificate

active

07639460

ABSTRACT:
The switching apparatus and the method are for varying the impedance of a phase line of a segment of an electrical power line. The phase line includes n conductors electrically insulated from each other and short-circuited together at two ends of the segment. The apparatus comprises at least one first vacuum interrupter connected in series with at least one of the conductors; at least one first controllable motor for selectively opening and closing the at least one first vacuum interrupter; a detector for detecting a parameter representative of current operating conditions of the phase line; and a controller for controlling the at least one first controllable motor according to the parameter detected by the detector.

REFERENCES:
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patent: 6018152 (2000-01-01), Allaire et al.
patent: 6198062 (2001-03-01), Mather et al.
patent: 6396172 (2002-05-01), Couture
patent: 6486569 (2002-11-01), Couture
patent: 6498315 (2002-12-01), Betz et al.
patent: 6952102 (2005-10-01), Sakaki et al.
patent: 7174261 (2007-02-01), Gunn et al.
patent: 0 439 953 (1991-08-01), None
patent: 00/35061 (2000-06-01), None
patent: 02/41459 (2002-05-01), None
International Search Report dated Sep. 28, 2005.
International Preliminary Report on Patentability dated Aug. 14, 2006.

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