发明授权
- 专利标题: Targeted timed reset fault indicator
- 专利标题(中): 定向定时复位故障指示器
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申请号: US10449143申请日: 2003-05-30
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公开(公告)号: US06963197B1公开(公告)日: 2005-11-08
- 发明人: Laurence Virgil Feight , James Manley Duros , Kurt James Fenske
- 申请人: Laurence Virgil Feight , James Manley Duros , Kurt James Fenske
- 申请人地址: US IL Mundelein
- 专利权人: E.O. Schweitzer Manufacturing Co., LLC.
- 当前专利权人: E.O. Schweitzer Manufacturing Co., LLC.
- 当前专利权人地址: US IL Mundelein
- 代理机构: Cook, Alex, McFarron, Manzo, Cummings & Mehler, Ltd.
- 主分类号: G01R19/14
- IPC分类号: G01R19/14 ; G01R19/165 ; G01R31/08
摘要:
A fault indicator for indicating the occurrence of a fault in an electrical conductor is reset at a predetermined time after the fault is detected, such as about 4 hours. The fault indicator has a housing, a high capacity battery, a fault sensor, a display for indicating a fault condition, and a programmable controller with a sleep state that draws low quiescent current. As a result the battery is expected to last the lifetime of the fault indicator. The fault indicator may optionally include current inrush restraint and/or voltage inrush restraint to inhibit the controller from activating the display to the fault indicating condition during the inrush conditions. The electromagnetic field about the conductor causes an electrostatic sensor to develop a differential voltage signal between two electrodes of different areas for the voltage inrush restraint circuit. Auxiliary contacts are provided to remotely monitor the fault indicator.
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