High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Operating mechanism structure or arrangement
Patent
1996-07-31
1998-06-02
Gellner, Michael L.
High-voltage switches with arc preventing or extinguishing devic
Arc preventing or extinguishing devices
Operating mechanism structure or arrangement
91416, 91 38, 137100, 200 82B, H01H 3302, F15B 1517
Patent
active
057603588
ABSTRACT:
A hydraulic device for a moving contact piece of a high-voltage power circuit breaker includes a reservoir and a low-pressure tank for hydraulic fluid. A changeover valve has a slide for alternately connecting one of the spaces in the drive-piston/cylinder configuration to the reservoir and to the low-pressure tank. At least one separately controlled and arranged control piston is associated with the slide. A servovalve controls the at least one control piston to drive the slide from a first position to a second position, i.e., from a connected position to a disconnected position of the power circuit breaker.
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Schaltanlagen, Balzer et al., ABB Schaltanlagen GmbH, Mannheim, Fed.Rep.Of Germany, 9th Edition, pp. 434-439, 1992.
ABB Patent GmbH
Friedhofer Michael A.
Gellner Michael L.
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