Switching device, in particular power switching device

Details Switching device, in particular power switching device Switching device, in particular power switching device

2009-01-14

2011-11-22

Nguyen, Truc (Department: 2833)

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Interposed non-conductor

C218S052000, C218S076000, C218S086000

Reexamination Certificate

active

08063334

ABSTRACT:
The switching device of at least one embodiment includes at least two switching contacts for interruption of a current path, with the switching contacts being arranged in a quenching chamber in order to quench an arc which is struck on opening. The quenching chamber opens into a gas outlet channel for overpressure which is produced during the striking of the arc to escape from. A pressure sensor for pressure detection is provided in the gas outlet channel and trips a switching mechanism, which is at least indirectly connected thereto, of the switching device on reaching a predeterminable pressure value. According to at least one embodiment of the invention, the gas outlet channel includes a Venturi nozzle. A reduced pressure, which is created in the Venturi nozzle as the gas flow passes through, is detectable by way of the pressure sensor.

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