发明授权
- 专利标题: Ground circuit voltage detector
- 专利标题(中): 接地电路电压检测器
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申请号: US309443申请日: 1981-10-07
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公开(公告)号: US4398188A公开(公告)日: 1983-08-09
- 发明人: Donn L. Feigal , Ronald R. Feigal
- 申请人: Donn L. Feigal , Ronald R. Feigal
- 专利权人: Feigal Donn L,Feigal Ronald R
- 当前专利权人: Feigal Donn L,Feigal Ronald R
- 主分类号: G01R19/165
- IPC分类号: G01R19/165 ; G01R27/18 ; H02H3/14 ; G08B21/00
摘要:
A ground circuit voltage detector for monitoring stray ground voltages occurring in dairy equipment to provide both an instantaneous warning indication and a sustained alarm indication. The voltage detector is connected between the equipment to be monitored at a sensing input and a separate ground. The sensed voltage is filtered and applied to a first comparator through an averaging circuit. If the average ground voltage exceeds the threshold level of the first comparator, a warning indication is provided which is proportional in strength to the sensed ground voltage. The first comparator is connected in series with a second comparator through an integrator. If the threshold level of the second comparator is exceeded, a sustained alarm indication is provided. A test circuit applies a voltage to the detector input to ensure the detector is operating properly.
公开/授权文献
- US5579224A Dictionary creation supporting system 公开/授权日:1996-11-26
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