专利内容由知识产权出版社提供
专利名称：Circuit breaker trip unit with digital
potentiometer
发明人：Helmut Weiher申请号：US14451803申请日：20140805公开号：US095103B2公开日：20150331
专利附图：
摘要：A circuit breaker trip unit includes an input section receiving a phase currentlevel signal. A processor is in communication with the input section and generates a firsttrip signal based on the phase current level signal and user-adjustable trip settings. The
trip settings include long time and short time pickup and delay settings. An analoginstantaneous trip circuit is in communication with both of the input section and theprocessor. The analog instantaneous trip circuit includes a digital potentiometer having anon-volatile memory. The potentiometer provides a reference signal corresponding to aresistance setting stored in the memory. The analog instantaneous trip circuit comparesthe phase current level and reference signals, and generates a second trip signal basedon a result of the comparing. The processor programs the resistance setting stored inthe memory according to a user-adjustable instantaneous current pickup setting.
申请人：Utility Relay Company, Ltd.
地址：Chagrin Falls OH US
国籍：US
代理机构：Pearne & Gordon LLP
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