发明名称 |
High voltage current limiting device |
摘要 |
A high voltage, current limiting device is connected in series with a high voltage power source and a protected load to interrupt current for an over-current condition [Typically 50 kA]. The current limiting device includes a current sensor/isolator and a switch connected in series. A current limiter, which may include a fuse or polymer current limiting material, is connected in parallel to the current sensor/isolator. The current sensor/isolator includes a pair of electrically insulated supports secured to a plurality of support rods to maintain the insulated supports at a predetermined fixed spacing to support an expulsion fuse. The expulsion fuse link includes a pair of copper conductors of adequate current carrying capability that are attached to ends of a main weak link fuse. A pair of coil springs hold the weak link fuse under tension to repel the conductors apart when the weak link fuse melts open during an over-current condition. An electrically insulating flapper pivotally connected at one end of a support rod provides a barrier between the source side and the load side of the current sensor/isolator when the main weak fuse melts open. One embodiment of the current limiter may include a high voltage polymer current limiting (PCL) device having a conductor-filled polymer composite material disposed between a pair of electrodes. The electrodes are forced inwardly by a pair of opposing springs to compress the composite material. The composite material, electrodes and springs are surrounded by pure silica, e.g., sand, within an enclosure.
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申请公布号 |
US6157286(A) |
申请公布日期 |
2000.12.05 |
申请号 |
US19990286063 |
申请日期 |
1999.04.05 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
RANJAN, RADHAKRISHNAN;FERGUSON, DONALD KENNETH;DUGGAL, ANIL RAJ;LEE, MINYOUNG |
分类号 |
H01H85/06;H01H85/36;H01H85/38;H01H85/46;(IPC1-7):H01H37/76;H01H39/00;H01H85/042;H01C7/10 |
主分类号 |
H01H85/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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