发明名称 |
Electrical apparatus |
摘要 |
An electrical apparatus for monitoring electrical continuity includes a number of input circuits each associated with a respective arm of a multi-phase rectifier circuit the continuity of which is to be monitored. Each input circuit includes a comparator which generates a train of pulses P while an input current persists in the arm. If a discontinuity arises in an arm for a first preset interval of time a monostable in that arm generates a first trigger signal. If the discontinuity persists for a further preset interval of time another monostable, common to all the arms, triggers an alarm via a bistable circuit.
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申请公布号 |
US4713652(A) |
申请公布日期 |
1987.12.15 |
申请号 |
US19850799643 |
申请日期 |
1985.11.19 |
申请人 |
THORN EMI ELECTRONICS LIMITED |
发明人 |
FRENCH, STEVEN J.;NEASHAM, DAVID L. |
分类号 |
G01R31/02;H02H7/125;(IPC1-7):G08B21/00 |
主分类号 |
G01R31/02 |
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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