| 摘要 |
An automatic precipitator energization control circuit wherein precipitator voltage is rapidly reduced to zero for an independently selective period of duration upon the occurrence of each spark or flashover in the precipitator and gradually increased to a voltage level determined with reference to the voltage level of the precipitator at the time the spark occurred. The deleterious effects of multiple sparks or spark bursts are eliminated, a soft start is assured, and true r.m.s. current is sensed to provide a current limit to override the spark control circuitry to limit the input power to the unit and to clear a short circuit condition in the precipitator from dirt buildup or the like.
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