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公开(公告)号：WO1997030501A1
公开(公告)日：1997-08-21
申请号：PCT/US1997001869
申请日：1997-01-31
Applicant: SQUARE D COMPANY
Inventor： SQUARE D COMPANY , STRADER, Walter, H. , DICKENS, James, W. , BROOKS, Stanley, J.
IPC: H02H01/00
CPC classification number: H01H71/125 , H01H2083/201 , H02H1/0015 , H02H1/06 , H02H3/44
Abstract: A system to detect arcing faults in an electrical distribution system with a line conductor connected to a utility power transformer. The system monitors the rate of change of electrical current in the line conductor and produces a signal which represents the rate of change. The system produces a pulse each time the rate-of-change signal exceeds a selected threshold, filters the rate-of-change signal and/or the pulses to substantially eliminate a signal or pulse which represents changes in the electrical current outside a selected frequency range, monitors the remaining pulses to detect when the number of pulses that occur within a selected time interval exceeds a predetermined threshold, and generates an arc-fault-detection signal in response to the occurrence of a number of pulses which exceed the threshold within the selected time interval.
Abstract translation: 一种用于检测配电系统中的电弧故障的系统，其中线路导线连接到公用电力变压器。 系统监测线路导体中电流的变化率，并产生一个表示变化率的信号。 该系统每当变化率信号超过所选阈值时产生脉冲，对变化率信号和/或脉冲进行滤波以基本上消除表示选定频率之外的电流变化的信号或脉冲 监视剩余脉冲，以检测在所选择的时间间隔内发生的脉冲数何时超过预定阈值，并且响应于超过阈值内的脉冲数的发生而产生电弧故障检测信号 选定的时间间隔。
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公开(公告)号：EP0820651A1
公开(公告)日：1998-01-28
申请号：EP97905790.0
申请日：1997-01-31
Applicant: SQUARE D COMPANY
Inventor： STRADER, Walter, H. , DICKENS, James, W. , BROOKS, Stanley, J.
CPC classification number: H01H71/125 , H01H2083/201 , H02H1/0015 , H02H1/06 , H02H3/44
Abstract: A system to detect arcing faults in an electrical distribution system with a line conductor connected to a utility power transformer. The system monitors the rate of change of electrical current in the line conductor and produces a signal which represents the rate of change. The system produces a pulse each time the rate-of-change signal exceeds a selected threshold, filters the rate-of-change signal and/or the pulses to substantially eliminate a signal or pulse which represents changes in the electrical current outside a selected frequency range, monitors the remaining pulses to detect when the number of pulses that occur within a selected time interval exceeds a predetermined threshold, and generates an arc-fault-detection signal in response to the occurrence of a number of pulses which exceed the threshold within the selected time interval.
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公开(公告)号：EP0820651B1
公开(公告)日：2009-03-04
申请号：EP97905790.8
申请日：1997-01-31
Applicant: SQUARE D COMPANY
Inventor： STRADER, Walter, H. , DICKENS, James, W. , BROOKS, Stanley, J.
IPC: H02H1/00
CPC classification number: H01H71/125 , H01H2083/201 , H02H1/0015 , H02H1/06 , H02H3/44
Abstract: A system to detect arcing faults in an electrical distribution system with a line conductor connected to a utility power transformer. The system monitors the rate of change of electrical current in the line conductor and produces a signal which represents the rate of change. The system produces a pulse each time the rate-of-change signal exceeds a selected threshold, filters the rate-of-change signal and/or the pulses to substantially eliminate a signal or pulse which represents changes in the electrical current outside a selected frequency range, monitors the remaining pulses to detect when the number of pulses that occur within a selected time interval exceeds a predetermined threshold, and generates an arc-fault-detection signal in response to the occurrence of a number of pulses which exceed the threshold within the selected time interval.
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