Switching device, use thereof and a method for switching
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United States of America Patent
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Jul 12, 2011
Grant Date -
Dec 24, 2009
app pub date -
Jul 31, 2009
filing date -
Feb 2, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device for switching in and out a load with respect to an alternating voltage feeder has two mechanical switches connected in series in a current path between the load and the feeder and each having a by-pass branch with at least one member with ability to block current therethrough in at least a blocking direction and conduct current therethrough in at least one direction. A unit is adapted to control a procedure of a switching out and switching in by synchronization with the current in the feeder and the voltage of the feeder, respectively.
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