Lightning proof device for filter
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United States of America Patent
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Mar 5, 2013
Grant Date -
Feb 7, 2013
app pub date -
Aug 5, 2011
filing date -
Aug 5, 2011
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Abstract
A lightning proof device for filter has a lightning proof device provided between a signal source input end and a filtering system of the filter. The lightning proof device has a first and a second metal inducing sheets opposite to each other, a filtering capacitor being provided corresponding to the first metal inducing sheet. The first metal inducing sheet is connected with the signal source input end of the filter and a first electrode end of the filtering capacitor, and a second electrode end of the filtering capacitor with the filtering system of the filter. The second metal inducing sheet is connected to the ground end. A gap is formed between the first and the second metal inducing sheets. In this manner, surge signal is absorbed and released by the gap in preliminary stage and the residual surge energy is filtered and de-energized by the filtering capacitor in final stage.
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