Limited flash-over electric power switch

Details Limited flash-over electric power switch Limited flash-over electric power switch

2009-02-05

2011-11-22

Nguyen, Truc (Department: 2833)

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Air-current blowout

C218S057000, C218S076000

Reexamination Certificate

active

08063333

ABSTRACT:
A limited flash-over electric power switch uses a dielectric gas regulator and a flash-over arrestor to greatly diminish the occurrences of high voltage flash-over during operation of a circuit interrupter. The dielectric gas regulator prevents the flow of the dielectric gas into the arc gap during an initial portion of the opening stroke of the interrupter contacts. Once the arc gap is sufficiently wide to greatly diminish the likelihood of a high voltage flash-over, the dielectric gas regulator allows the dielectric gas to flow into the arc gap to extinguish the arc. The flash-over arrestor snubs out incipient flash-over that may occur as the arc attempts to reform across the arc gap. The flash-over arrestor may be a conductive ring located on the interior surface of the nozzle in the region of the orifice.

REFERENCES:
patent: 4046978 (1977-09-01), Badon
patent: 4389554 (1983-06-01), Freeman
patent: 4420662 (1983-12-01), Niemeyer et al.
patent: 5850065 (1998-12-01), Yaginuma et al.
patent: 6744001 (2004-06-01), Dufournet et al.

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