| 摘要 |
A process and a device are disclosed for current limiting and/or circuit breaking and a switchgear assembly with such a device. As claimed in the invention a liquid metal is moved by a dielectric fluid drive with a control between a first current path for the rated current (I<SUB>1</SUB>), a second current path for current limiting (I<SUB>2</SUB>) and optionally a third current path for current interruption (i=0), the working fluid acting mechanically with a definable drive pressure (p<SUB>1</SUB>, p<SUB>2</SUB>) directly on one surface of the liquid metal. Embodiments are, among others, the following: insulating gas or insulating liquid as the drive fluid; pressure drive with pressure vessels and valves or a piezodrive for the working fluid; and design criteria for the liquid metal arrangement, drive pressure (p<SUB>1</SUB>, p<SUB>2</SUB>) and piezodrive. Advantages are, among others, the following: reversible current limiting and current interruption, also suited for high voltages and current, fast reaction times, low wear and maintenance-friendly.
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