发明授权
- 专利标题: Electrical protection systems
- 专利标题(中): 电气保护系统
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申请号: US09274561申请日: 1999-03-23
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公开(公告)号: US06356424B1公开(公告)日: 2002-03-12
- 发明人: Inho Myong , William T. Presley
- 申请人: Inho Myong , William T. Presley
- 主分类号: H02H300
- IPC分类号: H02H300
摘要:
An electrical protection system on a power distribution side includes a control element of a series combination of a PTC device thermally coupled with a resistive device, and a relay coil coupled with relay contacts. If the relay contacts are open the only way in which they can be closed is by supplying current to the relay coil through a resistance-capacitance network. An electronic control module on a control side includes an electronic control module for monitoring a voltage present in the system, and a switch for opening a current path feeding the system upon detection of a fault condition. An indicator indicates presence of a sensed fault condition.
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