Method for sensing welded contacts on a switching device
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United States of America Patent
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Feb 20, 2018
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app pub date -
Apr 30, 2014
filing date -
May 16, 2013
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Abstract
A method for sensing a welded relay contact when breaking both sides of a power line on a HVAC device including the steps: applying a first signal to one of a pair of switching devices; electronically sensing a second signal, with a sensing device, whether the other of said two switching devices is welded closed; and sending a third signal from the sensing device indicative of whether the other of said two switching devices is welded closed.
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