Switchgear for conducting and breaking current

Abstract

The invention relates to a switchgear for conducting and breaking current, said switchgear having: a first mechanical contact assembly (10); a semiconductor switch (20) connected in parallel with said first mechanical contact assembly; A second mechanical contact assembly (30) connected in series with the first mechanical contact assembly; an auxiliary coil (40) connected to a switch for moving contacts of the first and second mechanical contact assemblies the circuit of the driver is electrically isolated, and the auxiliary coil is electromagnetically coupled to the coil of the switch driver such that when the voltage supply of the switch driver is disconnected, a voltage is generated in the auxiliary coil; and switching electronics (50) , the switching electronics is configured to switch on and off the semiconductor switch (20) and to supply the switching electronics with the voltage generated in the auxiliary coil when the voltage supply of the switch driver is switched off . According to the invention, said switching electronics (50) are configured to switch on and off again several times during the opening process of said first and second mechanical contact assemblies (10, 30) according to a predetermined sequence. the semiconductor switch (20) to interrupt the current flow.

Description

technical field [0001] The present invention relates to a switchgear for conducting and breaking current, in particular a hybrid switch assembly for conducting and breaking high DC current and low frequency AC current, and a switchgear with such a switchgear. Background technique [0002] German Published Patent Application DE 10 2013 114 259 A1 describes an advantageous variant of a hybrid switching assembly in which the time of current loading of the power semiconductors is minimized to obtain the longest possible life expectancy and the smallest possible magnitude, especially for the current range This is important for power contactors of hundreds of amps. In order to minimize the time for the load current to flow through the power semiconductors, the commutation moment is obtained by a current converter and the current through the semiconductors is only maintained until the disconnected mechanical switch section has reached sufficient electrical strength. In this short ...

AI Technical Summary

Problems solved by technology

Even in the case of hybrid switches with a mechanical switching device in the form of a vacuum switching chamber for conducting and breaking very high currents, as is known, for example, from German laid-open patent application DE 10 2013 114 260 A1, in some cases It can lead to the formation of undesired switching arcs

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