发明名称 |
Method and apparatus for detecting and suppressing a parallel arc fault |
摘要 |
<p>Electrical equipment (14) is safeguarded from damage due to parallel arc faults by a circuit that provides several levels of protection. A semiconductor switch (18) and a current sensor (24) are placed in series with the electrical equipment (14). When the current to the equipment exceeds a first threshold for a predefined period of time, the semiconductor switch (18) is rendered non-conductive until the circuit is specifically reset. When the current to the equipment exceeds a greater second threshold, a pulsed signal alternately places the semiconductor switch (18) in conductive and non-conductive states so that the average current applied to the equipment (14) is within an acceptable level. The pulses are measured to determine whether a parallel arc fault has occurred. When the measured pulses (74) are within a predetermined range, a parallel arc fault is declared and the semiconductor switch (18) is rendered non-conductive. Should the current exceed an even greater third threshold, the semiconductor switch (18) is immediately rendered non-conductive until the circuit is manually reset.</p> |
申请公布号 |
EP1298770(A2) |
申请公布日期 |
2003.04.02 |
申请号 |
EP20020021848 |
申请日期 |
2002.09.29 |
申请人 |
EATON CORPORATION |
发明人 |
PAHL, BIRGER;JAHN, RONALD RICHARD;ZUERCHER, JOSEPH CHARLES;HASTINGS, JEROME KENNETH;BERKOPEC, WILLIAM EDWARD;KRSTIC, SLOBODAN |
分类号 |
H02H1/00;H02H3/08;H02H3/087;H02H3/093;(IPC1-7):H02H1/00 |
主分类号 |
H02H1/00 |
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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