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公开(公告)号：EP1429437A2
公开(公告)日：2004-06-16
申请号：EP03257479.0
申请日：2003-11-27
IPC分类号： H02H1/00
CPC分类号： H02H1/0015 , H02H1/04
摘要： Current flowing through a load is monitored by a transformer (Tr1) having a small mutual inductance. The secondary coil is shorted through a rectifier circuit to deliver a charge which, in a first preferred embodiment, is connected to a log charge translator circuit comprising matching diodes (D9, D7 and D10, D8) and a capacitor (C2) to provide a capacitor voltage proportional to the log of the charge delivered through the rectifier circuit. The capacitor is reset after each measurement. In a modified embodiment, the log translator circuit comprises a pair of transistors (T1, T2) and a capacitor (C2). According to the preferred embodiments, two measurements of the capacitor voltage are taken each half cycle at a time determined by the absolute value of the line voltage. The measurements per half cycle are stored in words in a stack and processed through a three or five cycle algorithm for determining fluctuations which will cancel out disturbances caused by nuisance loads that are repetitive or continuously varying. In a described embodiment, a pushdown stack of 60 words is used with fluctuations compared by a microcontroller to a selected limit. Measurements for the last half second of measurements are considered, ignoring the first and last measurement, and when the sum of the fluctuations exceeds the selected limit an arc is indicated and a circuit interrupter is tripped. A self test button is connected to the microcontroller which, when depressed, results in charging of the capacitor to stimulate the detection of an arc.
摘要翻译： 流过负载的电流由具有小互感的变压器（Tr1）监测。 次级线圈通过整流器电路短路以传送电荷，在第一优选实施例中，该电荷连接到包括匹配二极管（D9，D7和D10，D8）和电容器（C2）的对数电荷转换器电路以提供 电容器电压与通过整流器电路输送的电荷的对数成比例。 每次测量后电容器都会复位。 在修改的实施例中，对数转换器电路包括一对晶体管（T1，T2）和电容器（C2）。 根据优选实施例，电容器电压的两次测量在由线电压的绝对值确定的时间的每个半周期获取。 每个半周期的测量结果以字的形式存储在堆栈中，并通过三个或五个周期算法进行处理，以确定波动，从而消除重复或连续变化的干扰负载造成的干扰。 在所描述的实施例中，使用由60个字组成的下推堆栈，其中由微控制器比较的波动与选定的限制相比较。 考虑最后半秒测量的测量，忽略第一次和最后一次测量，并且当波动总和超过选定的极限值时，指示电弧并断开电路断续器。 一个自我测试按钮连接到微控制器，当按下时，它会导致电容器充电，以刺激电弧的检测。
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公开(公告)号：EP1638181A3
公开(公告)日：2006-04-19
申请号：EP05254787.4
申请日：2005-07-29
发明人： Pellon, Christian V. , Rabiner, Mark D. , Nicolls, Christopher A. , Zanelli, Robert , Fontaine, Lucien , Edmunds, Lynwald , Parker, Michael , Kawate, Keith W. , Mayer, Roger D. , Lavado, Michael J. , Ting, Jeffrey B.
IPC分类号： H02H1/00
CPC分类号： H02H1/0015
摘要： An apparatus and method for detecting arc faults that have reduced susceptibility to nuisance tripping. The apparatus includes a current sensor, an input sense circuit, an arcing sense circuit, a power supply, a tripping (firing) circuit, a processor, and an electromechanical interface. The current sensor monitors a power input comprising an AC current, and provides high frequency components of the AC current to the input sense circuit. The input sense circuit filters and rectifies the AC signal, and provides the rectified signal to the arcing sense circuit. The arcing sense circuit provides a voltage level accumulated over a predetermined time period, and digital signals indicative of possible electrical arcing occurring during the sampling period, to the processor. The processor measures the voltage level, stores information relating to measured voltages and the digital signals, and processes the stored information using one or more algorithms, thereby determining whether the signals resulted from an arc fault or a nuisance load. In the event the signals resulted from an arc fault, the processor activates the firing circuit to trip the electromechanical interface, thereby interrupting the power output to the load.
摘要翻译： 一种检测电弧故障的装置和方法，其具有降低的烦扰跳闸的易感性。 该设备包括电流传感器，输入感测电路，电弧感测电路，电源，跳闸（触发）电路，处理器和机电接口。 电流传感器监测包括AC电流的功率输入，并将AC电流的高频分量提供给输入感测电路。 输入检测电路对AC信号进行滤波和整流，并将整流信号提供给电弧检测电路。 电弧检测电路向处理器提供在预定时间段内累积的电压电平以及指示在采样周期期间发生的可能电弧的数字信号。 处理器测量电压电平，存储与测量电压和数字信号有关的信息，并且使用一种或多种算法处理存储的信息，由此确定信号是否由电弧故障或干扰性负载产生。 如果信号是由电弧故障引起的，则处理器激活触发电路以使机电接口跳闸，从而中断输出到负载的功率。
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公开(公告)号：EP1213738A3
公开(公告)日：2004-08-25
申请号：EP01310252.0
申请日：2001-12-07
CPC分类号： H01H73/306 , H01H71/04 , H01H71/123 , H01H71/127 , H01H83/20 , H01H2083/201 , H02H1/0015
摘要： A circuit breaker (10) has a current carrying bimetallic element (18) which bends upon self-heating and upon being subjected to a selected overload current transfers motion to a connecting plate (32) which displaces a latch surface (42b) from a catch (34a) of a bell crank mechanism (34) allowing a spring biased operating member (28) to move movable contact means (12) out of contact engagement with stationary contact means (14) thereby tripping the circuit breaker. An arc sensing circuit (52) is coupled to the load circuit and upon sensing selected arcs causes an arc responsive actuator (56, 62) to be energized to transfer motion to the latch (42) to trip the circuit breaker.
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4.发明公开Apparatus and method for detecting arc faults 有权Vorrichtung und Verfahren zur Erkennung vonLichtbögen
公开(公告)号：EP1638181A2
公开(公告)日：2006-03-22
申请号：EP05254787.4
申请日：2005-07-29
发明人： Pellon, Christian V. , Rabiner, Mark D. , Nicolls, Christopher A. , Zanelli, Robert , Fontaine, Lucien , Edmunds, Lynwald , Parker, Michael , Kawate, Keith W. , Mayer, Roger D. , Lavado, Michael J. , Ting, Jeffrey B.
IPC分类号： H02H1/00
CPC分类号： H02H1/0015
摘要： An apparatus and method for detecting arc faults that have reduced susceptibility to nuisance tripping. The apparatus includes a current sensor, an input sense circuit, an arcing sense circuit, a power supply, a tripping (firing) circuit, a processor, and an electromechanical interface. The current sensor monitors a power input comprising an AC current, and provides high frequency components of the AC current to the input sense circuit. The input sense circuit filters and rectifies the AC signal, and provides the rectified signal to the arcing sense circuit. The arcing sense circuit provides a voltage level accumulated over a predetermined time period, and digital signals indicative of possible electrical arcing occurring during the sampling period, to the processor. The processor measures the voltage level, stores information relating to measured voltages and the digital signals, and processes the stored information using one or more algorithms, thereby determining whether the signals resulted from an arc fault or a nuisance load. In the event the signals resulted from an arc fault, the processor activates the firing circuit to trip the electromechanical interface, thereby interrupting the power output to the load.
摘要翻译： 一种用于检测电弧故障的装置和方法，其具有降低的对故障跳闸的敏感性。 该装置包括电流传感器，输入检测电路，电弧感测电路，电源，跳闸（点火）电路，处理器和机电接口。 电流传感器监视包括AC电流的功率输入，并且将AC电流的高频分量提供给输入检测电路。 输入检测电路对AC信号进行滤波和整流，并将整流后的信号提供给电弧感测电路。 电弧感测电路提供在预定时间段内累积的电压电平，以及指示在采样周期期间发生的可能的电弧放电的数字信号到处理器。 处理器测量电压电平，存储与测量电压和数字信号有关的信息，并使用一种或多种算法对存储的信息进行处理，从而确定信号是由电弧故障还是由妨扰负载引起的。 在信号由于电弧故障引起的情况下，处理器激活点火电路以使机电接口跳闸，从而中断输出到负载的功率。
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公开(公告)号：EP1213738A2
公开(公告)日：2002-06-12
申请号：EP01310252.0
申请日：2001-12-07
CPC分类号： H01H73/306 , H01H71/04 , H01H71/123 , H01H71/127 , H01H83/20 , H01H2083/201 , H02H1/0015
摘要： A circuit breaker (10) has a current carrying bimetallic element (18) which bends upon self-heating and upon being subjected to a selected overload current transfers motion to a connecting plate (32) which displaces a latch surface (42b) from a catch (34a) of a bell crank mechanism (34) allowing a spring biased operating member (28) to move movable contact means (12) out of contact engagement with stationary contact means (14) thereby tripping the circuit breaker. An arc sensing circuit (52) is coupled to the load circuit and upon sensing selected arcs causes an arc responsive actuator (56, 62) to be energized to transfer motion to the latch (42) to trip the circuit breaker.
摘要翻译： 断路器（10）具有载流双金属元件（18），其在自加热时弯曲并且经受选定的过载电流传递运动到连接板（32），连接板（32）将闩锁表面（42b）从捕获 （34）上的一个（34a），允许弹簧偏压的操作构件（28）使可动接触装置（12）与固定接触装置（14）脱离接触，从而使断路器跳闸。 电弧感测电路（52）耦合到负载电路，并且在感测所选择的电弧时，使电弧响应致动器（56,62）被激励以将运动传递到闩锁（42）以使断路器跳闸。
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