ELEKTRISCHE HOCHSTROMVORRICHTUNGEN

摘要

The cooperating surfaces of the two contacts of the heavy current switchgear can be brought together by extension, in order to form a path for the heavy currents. At least one contact consists of a solid conductor (1) with a surface coated with a liquid gallium or its liquid alloy. Preferably both contacts are of the same design. One contact may contain a droplet or a small volume of liquid gallium or its alloy. Typically the liquid alloy contains gallium, indium and/or tin and/or zinc. The connection between the contacts may be attained during switchgear operation by bridging the gap between them with liquid metal. The current path in the switchgear is coaxial and symmetrical in relation to the gap so that no asymmetry magnetic fields are generated.