Heavy-duty circuit-breaker with sealing against hot gas

Details Heavy-duty circuit-breaker with sealing against hot gas Heavy-duty circuit-breaker with sealing against hot gas

2007-06-21

2010-06-08

Enad, Elvin G (Department: 2832)

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Air-current blowout

C218S001000, C218S043000, C218S059000, C218S062000, C335S201000

Reexamination Certificate

active

07732727

ABSTRACT:
The heavy-duty circuit-breaker with arc blowing has an element which is sensitive to hot gas and/or to gas pressure and is protected by means of a seal against a hot-gas flow. The seal is advantageously a movable non-contacting seal. The seal has a channel entrance for production of a partial hot-gas flow of the hot-gas flow and, connected downstream from this, a channel in order to reduce the mass flow of the partial hot-gas flow, and an expansion chamber in order to expand the volume of the partial hot-gas flow. The expansion chamber is a pressure-relief area. The element may, for example, be a guide element, a contact-making element or a sealing element.

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Form PCT/ISA/210 (International Search Report) dated Mar. 21, 2006.
Form PCT/ISA/237 (Written Opinion of the International Searching Authority).
European Search Report dated Jun. 16, 2005 (with English translation of category of cited documents).
English translation of Form PCT/ISA/237 (Written Opinion of the International Searching Authority).

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