Hybrid solid state/mechanical switch with failure protection
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United States of America Patent
Stats
-
Oct 21, 1986
Grant Date -
N/A
app pub date -
Jul 16, 1984
filing date -
Jul 16, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hybrid solid state/mechanical switch is provided with a pair of mechanical contacts connected in parallel with a solid state switching device. These components are operated by a control circuit to achieve arcless current interruption under normal conditions. A circuit breaking device, which can be operated by a crowbar circuit, provides failure protection for the hybrid switch if excessive leakage current is detected in the solid state switching device or current continues to flow through the switch at a preselected time following the occurrence of a turn-off command signal.
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