公开(公告)号：US20040100274A1

公开(公告)日：2004-05-27

申请号：US10453105

申请日：2003-06-03

申请人： Siemens Energy & Automation, Inc.

发明人： William Gloster ,  Carlos Restrepo

IPC分类号： H01H009/50 ,  G01R031/08 ,  G01R031/12

CPC分类号： G01R31/3277

摘要： Arc fault detector device (such as arc fault circuit interrupter) testing apparatus and methods including generating a true arc fault current by energizing a contact relay at a predetermined frequency, applying and regulating the true arc fault current to a detection device under test by selecting a load from a resistor bank that is coupled to the tested device, determining whether the device under test was able to detect the arc fault current. The invention is useful for determining whether an arc fault circuit interrupter is capable of tripping in response to an arc fault current.

摘要翻译： 电弧故障检测装置（例如电弧故障电路断路器）的试验装置和方法，包括通过以预定频率对接触继电器通电而产生真正的电弧故障电流，通过选择一个 从耦合到被测设备的电阻器组负载，确定被测器件是否能够检测到电弧故障电流。 本发明对于确定电弧故障电路断路器是否能够响应于电弧故障电流而跳闸是有用的。

公开(公告)号：US20030151412A1

公开(公告)日：2003-08-14

申请号：US10169808

申请日：2003-03-17

发明人： Brian Gregory ,  Andrew Leslie Barclay

IPC分类号： H01H009/50 ,  G01R031/08

CPC分类号： G01R15/181 ,  G01R15/14 ,  G01R31/021 ,  G01R31/1272

摘要： A partial discharge detection test link (20) and system detect partial discharge of a power cable at a power cable accessory (6). The power cable accessory includes a first accessory component and a second accessory component connected to each other. The partial discharge detection test link (20) is a permanent or temporary substitute for a conventional service link, connects directly across the power cable accessory and includes a conductor member (22) and a partial discharge sensor (24). The conductor member (22) has an electrically conductive element (26) and an insulation (28) surrounding and extending along the electrically conductive element. The electrically conductive element (26) is electrically connected directly between the first and second accessory components. The partial discharge sensor (24) is disposed about the conductor member (22) and has the electrically conductive element as a primary winding and a secondary winding with the insulation positioned between the primary and secondary windings. The partial discharge detection system includes the conductor member, the partial discharge sensor, a first converter device, a second converter device, and a partial discharge measuring instrument. The first converter device converts partial discharge electrical signals into alternative energy signals. The second converter device converts the alternative energy signals into electrical output signals. The partial discharge measuring instrument reads the electrical output signal and measures the partial discharge from the power cable. Methods for detecting partial discharge on an energized power cable are also described.

摘要翻译： 局部放电检测测试链路（20）和系统检测电力电缆附件（6）上的电力电缆的局部放电。 电力电缆附件包括彼此连接的第一辅助部件和第二附件部件。 局部放电检测测试连杆（20）是常规维修链接的永久或临时替代品，直接连接在电力电缆附件上，并包括导体部件（22）和局部放电传感器（24）。 导体构件（22）具有导电元件（26）和围绕并沿导电元件延伸的绝缘体（28）。 导电元件（26）直接电连接在第一和第二辅助部件之间。 局部放电传感器（24）围绕导体构件（22）设置，并且具有作为初级绕组的导电元件和具有位于初级和次级绕组之间的绝缘体的次级绕组。 局部放电检测系统包括导体部件，局部放电传感器，第一转换器装置，第二转换器装置和局部放电测量装置。 第一转换器装置将局部放电电信号转换成替代能量信号。 第二转换器装置将替代能量信号转换成电输出信号。 局部放电测量仪器读取电气输出信号，并测量电源线的局部放电。 还描述了在通电电力电缆上检测局部放电的方法。

公开(公告)号：US20030038640A1

公开(公告)日：2003-02-27

申请号：US09939220

申请日：2001-08-24

发明人： Joseph C. Zuercher ,  Steven Christopher Schmalz

IPC分类号： H01H009/50 ,  G01R031/08 ,  G01R031/12

CPC分类号： H02H1/0015 ,  B60L3/0023 ,  H02H1/04

摘要： Arcing in dc electrical systems subject to cyclic disturbances is detected by a current sensor, and a bandpass filter sensitive to arcing noise, which filters the sensor current. The absolute value of the bandpass filtered signal is integrated over repetitive intervals in a resettable analog integrator. A low cost microprocessor samples and resets the analog integrator at a frequency below the pass band and generates a time attenuated accumulation of the samples that produces an arcing signal if it reaches a predetermined limit. To improve nuisance immunity, the sensed dc current is compared in a high speed comparator to the average sensed dc current, and only samples taken by the microprocessor during a predetermined time period after the sensed dc current exceeds the average sensed dc current in a predetermined manner are accumulated. The average sensed dc current is also used by the microprocessor to provide overload protection.

摘要翻译： 通过电流传感器检测直流电系统中受到循环干扰的电弧，以及对电弧噪声敏感的带通滤波器，可对传感器电流进行滤波。 带通滤波信号的绝对值在可复位模拟积分器中的重复间隔上进行积分。 低成本微处理器以低于通带的频率对模拟积分器进行采样和复位，并产生如果达到预定极限时产生电弧信号的采样的时间衰减累积。 为了提高噪声抗扰度，将感测的直流电流在高速比较器中与平均感测的直流电流进行比较，并且仅在所感测的直流电流以预定方式超过平均感测直流电流之后的预定时间段内由微处理器采集的采样 累积了 微处理器还使用平均感测直流电流来提供过载保护。

公开(公告)号：US20020079903A1

公开(公告)日：2002-06-27

申请号：US09742607

申请日：2000-12-21

发明人： James E. Smith ,  David A. Riffe ,  Chandrakant Z. Tailor ,  Alexander Golubev

IPC分类号： H01H009/50 ,  G01R031/08 ,  G01R031/12

CPC分类号： G01R15/16 ,  G01R31/1227 ,  H02B11/04

摘要： An electrical system and a sensor for on-line monitoring of the state of high-voltage insulation in the electrical system. In this arrangement, the signals associated with partial discharge activity are monitored and transmitted from the sensor to monitoring instrumentation. The sensor is interconnected with the potential stress shield of existing bushings. The capacitance in the bushing between the main conductor and the stress shield conducts partial discharge current which is available for being sensed.

摘要翻译： 一种用于在线监测电气系统中高压绝缘状态的电气系统和传感器。 在这种布置中，与局部放电活动相关联的信号被监测并从传感器传输到监测仪器。 传感器与现有衬套的潜在应力屏蔽相互连接。 主导体和应力屏蔽之间的衬套中的电容导致可被感测的局部放电电流。

公开(公告)号：US20040245999A1

公开(公告)日：2004-12-09

申请号：US10456421

申请日：2003-06-06

发明人： Hendrik V. Walde ,  Brian D. Kowal

IPC分类号： H01H009/50 ,  G01R031/08 ,  G01R031/12

CPC分类号： H01J37/32431 ,  H01J2237/0206

摘要： This invention teaches an arc detection and arc reduction circuit for use with power supplies for delivering power to a plasma processing system that utilizes a resonant circuit that stores energy and when the voltage drops between the cathode and anode of the processing chamber the stored energy generates a current in a current transformer in response to the voltage change to switch a magnetically coupled inductor in parallel with the cathode and anode causing a reversal of the voltage that reduces arcs in the plasma chamber. In an alternate embodiment the magnetically coupled inductor is replaced by a pulse transformer and the pulse transformer is placed in parallel with the cathode and anode causing a reversal of the voltage that reduces arcs in the plasma chamber.

摘要翻译： 本发明教导了一种用于电力供应的电弧检测和电弧消除电路，该电源用于向等离子体处理系统输送功率，该等离子体处理系统利用存储能量的谐振电路，以及当处理室的阴极和阳极之间的电压下降时，存储的能量产生 电流互感器中的电流响应于电压变化以切换与阴极和阳极并联的磁耦合电感器，导致电压反转，从而减小等离子体室中的电弧。 在替代实施例中，磁耦合电感器被脉冲变压器代替，并且脉冲变压器与阴极和阳极平行放置，导致电压反转，从而减小等离子体室中的电弧。

公开(公告)号：US20040046568A1

公开(公告)日：2004-03-11

申请号：US10363429

申请日：2003-08-28

发明人： Joseph Unsworth ,  David Tallis

IPC分类号： H01H009/50

CPC分类号： G01R31/1209 ,  G01R31/1272 ,  H01F27/402 ,  H01F2027/406 ,  H01H33/26

摘要： An apparatus (10) for detecting the occurrence of partial discharge in electrical equipment, such as high voltage transformers. The apparatus comprises a detecting means including an ultrasonic transducer (11) mounted at one end of an electrically insulating elongate rod (13). The ultrasonic transducer (11) is adapted to detect ultrasonic pulses or waves generated by the occurrence of a partial discharge in the electrical equipment. A radio frequency (RF) transducer (17) is also utilized to detect radio frequency (RF) pulses or waves also generated by the partial discharge. The rod (13) can be mounted in the wall of the electrical equipment and so provide a mechanism for adjusting the position of the detecting means within the electrical equipment. The apparatus is also removable from the electrical equipment and re-locatable to other equipment.

摘要翻译： 一种用于检测诸如高压变压器的电气设备中局部放电发生的装置（10）。 该装置包括检测装置，其包括安装在电绝缘细长杆（13）的一端的超声波换能器（11）。 超声波换能器（11）适于检测在电气设备中由局部放电发生而产生的超声脉冲或波。 射频（RF）传感器（17）也用于检测也由局部放电产生的射频（RF）脉冲或波。 杆（13）可以安装在电气设备的壁中，因此提供了用于调节电气设备内的检测装置的位置的机构。 该设备也可从电气设备中移除并重新定位到其他设备。

公开(公告)号：US20020063565A1

公开(公告)日：2002-05-30

申请号：US09825754

申请日：2001-04-04

发明人： John E. Stroth

IPC分类号： H01H009/50 ,  G01R031/08 ,  G01R031/12

CPC分类号： G01R31/3277

摘要： A power line testing device with signal generator and signal detector incorporates a DC power supply that is capable of generating DC power from a miswired outlet, as long as there is a hot conductor and a return path. The device includes a signal generator which generates a signal that is easily distinguishable from noise. The transmitter further includes a spark gap for creating an arc used to test the function of an ACFI device connected to the branch under test. The transmitter further detects the integrity of circuit ground by measuring its impedance. A receiver of the device measures the elapsed time of the testing signals, permitting a more sophisticated test of interrupter device function.

摘要翻译： 具有信号发生器和信号检测器的电力线测试装置包括直流电源，其能够从误接线出口产生直流电力，只要存在热导体和返回路径即可。 该装置包括信号发生器，其生成易于与噪声区分的信号。 发射机还包括用于创建用于测试连接到被测分支的ACFI设备的功能的电弧的火花隙。 发射机通过测量其阻抗来进一步检测电路接地的完整性。 设备的接收器测量测试信号的经过时间，允许对断续器设备功能进行更复杂的测试。

公开(公告)号：US20020033701A1

公开(公告)日：2002-03-21

申请号：US09996464

申请日：2001-11-28

申请人： Pass & Seymour, Inc.

发明人： Bruce F. Macbeth ,  Thomas N. Packard

IPC分类号： H01H009/50 ,  G01R031/08 ,  G01R031/12

CPC分类号： H02H1/0015 ,  G01R31/12

摘要： Briefly stated, and in accordance with a presently preferred embodiment of the invention, an arc fault detecting circuit using, a pulse width modulation, or PWM, technique is used to sense series or parallel arc faults. When arc faults occur, typically an arc step in current is followed by broad band arc noise which is caused by the random fluctuations in arc column resistance. In this invention, a logic signal is created which has a duration or width that corresponds to the time interval during which the broad band arc noise generated by the arc is present. Typically an arc fault randomly starts, generates broad band arc noise, and then extinguishes as the next current zero cross of the AC load current is approached. The random start causes PWM of the logic pulse whenever the start of the arc randomly moves with respect to the current zero cross. An arc fault that randomly starts, and then randomly stops, will also cause PWM with respect to the zero cross. The PWM logic pulse is coupled to the input of a microprocessor which measures and stores the length of the present PWM pulse under measurement, and compares that pulse to the pulse length of the last stored PWM pulse, and increments a counter if the difference in pulse length is greater than a predetermined amount. When the counter number is greater than or equal to a predetermined number held in the microprocessor memory, an output signal is sent to a controller which activates the circuit interrupter. Another input to the microprocessor, corresponding to the magnitude of the arc current, is used to adjust the predetermined number value down or up depending on the intensity of the arc fault for faster or slower interrupts respectively.

摘要翻译： 简而言之，根据本发明的目前优选实施例，使用使用脉冲宽度调制或PWM技术的电弧故障检测电路来感测串联或并联电弧故障。 当发生电弧故障时，通常电弧中的电弧步骤之后是由电弧柱电阻的随机波动引起的宽带电弧噪声。 在本发明中，产生逻辑信号，其具有对应于存在由电弧产生的宽带电弧噪声的时间间隔的持续时间或宽度。 通常，电弧故障随机启动，产生宽带电弧噪声，然后随着交流负载电流的下一个当前零交叉接近而熄灭。 每当电弧的起点相对于当前的零交叉随机移动时，随机启动就会导致逻辑脉冲的PWM。 随机启动然后随机停止的电弧故障也将导致相对于零交叉的PWM。 PWM逻辑脉冲耦合到微处理器的输入端，该微处理器测量并存储当前测量的PWM脉冲的长度，并将该脉冲与最后存储的PWM脉冲的脉冲长度进行比较，如果脉冲差 长度大于预定量。 当计数器数大于或等于保存在微处理器存储器中的预定数量时，输出信号被发送到启动电路断续器的控制器。 对应于电弧电流的大小的微处理器的另一个输入用于分别根据电弧故障的强度向下或向上调整预定数值，以实现更快或更慢的中断。

公开(公告)号：US20010040458A1

公开(公告)日：2001-11-15

申请号：US09295219

申请日：1999-04-21

发明人： BRUCE F. MACBETH ,  THOMAS N. PACKARD

IPC分类号： H01H009/50 ,  G01R031/08 ,  G01R031/12

CPC分类号： H02H1/0015 ,  G01R31/12

摘要： Briefly stated, and in accordance with a presently preferred embodiment of the invention, an arc fault detecting circuit using a pulse width modulation, or PWM, technique is used to sense series or parallel arc faults. When arc faults occur, typically an arc step in current is followed by broad band arc noise which is caused by the random fluctuations in arc column resistance. In this invention, a logic signal is created which has a duration or width that corresponds to the time interval during which the broad band arc noise generated by the arc is present. Typically an arc fault randomly starts, generates broad band arc noise, and then extinguishes as the next current zero cross of the AC load current is approached. The random start causes PWM of the logic pulse whenever the start of the arc randomly moves with respect to the current zero cross. An arc fault that randomly starts, and then randomly stops, will also cause PWM with respect to the zero cross. The PWM logic pulse is coupled to the input of a microprocessor which measures and stores the length of the present PWM pulse under measurement, and compares that pulse to the pulse length of the last stored PWM pulse, and increments a counter if the difference in pulse length is greater than a predetermined amount. When the counter number is greater than or equal to a predetermined number held in the microprocessor memory, an output signal is sent to a controller which activates the circuit interrupter. Another input to the microprocessor, corresponding to the magnitude of the arc current, is used to adjust the predetermined number value down or up depending on the intensity of the arc fault for faster or slower interrupts respectively.

摘要翻译： 简而言之，根据本发明的目前优选实施例，使用使用脉冲宽度调制或PWM技术的电弧故障检测电路来感测串联或并联电弧故障。 当发生电弧故障时，通常电弧中的电弧步骤之后是由电弧柱电阻的随机波动引起的宽带电弧噪声。 在本发明中，产生逻辑信号，其具有对应于存在由电弧产生的宽带电弧噪声的时间间隔的持续时间或宽度。 通常，电弧故障随机启动，产生宽带电弧噪声，然后随着交流负载电流的下一个当前零交叉接近而熄灭。 每当电弧的起点相对于当前的零交叉随机移动时，随机启动就会导致逻辑脉冲的PWM。 随机启动然后随机停止的电弧故障也将导致相对于零交叉的PWM。 PWM逻辑脉冲耦合到微处理器的输入端，该微处理器测量并存储当前测量的PWM脉冲的长度，并将该脉冲与最后存储的PWM脉冲的脉冲长度进行比较，如果脉冲差 长度大于预定量。 当计数器数大于或等于保存在微处理器存储器中的预定数量时，输出信号被发送到启动电路断续器的控制器。 对应于电弧电流的大小的微处理器的另一个输入用于分别根据电弧故障的强度向下或向上调整预定数值，以实现更快或更慢的中断。

公开(公告)号：US20030160619A1

公开(公告)日：2003-08-28

申请号：US10160547

申请日：2002-05-31

申请人： Hendry Mechanical Works

发明人： Michael T. Parker

IPC分类号： H01H009/50 ,  G01R031/08 ,  G01R031/12

CPC分类号： G01R31/3336

摘要： A system for arc detection testing using synthesized arcs is disclosed, which uses voltage and current waveform generators to generate an arc's analog form voltage and current waveform from a digital form of the arc's captured waveforms. A voltage waveform amplifier and a current waveform amplifier are included, with the outputs of the voltage and current waveform generators coupled to the input to inputs of the voltage and current waveform amplifiers, respectively. The outputs of the voltage and current waveform amplifiers are connected in circuit to a device under test to test the device's response to the waveforms. A method for testing a device's response to a simulated arcing condition is also disclosed. An electric arc's voltage and current waveforms are captured in digital form. Analog form voltage and current waveform are generated from the captured digital voltage and current waveforms. The analog form voltage and current waveforms are applied to a device under test and the device is monitored to determine its response to the waveforms.

摘要翻译： 公开了一种使用合成电弧进行电弧检测测试的系统，其使用电压和电流波形发生器从电弧捕获波形的数字形式产生电弧的模拟电压和电流波形。 包括电压波形放大器和电流波形放大器，电压和电流波形发生器的输出分别耦合到输入到电压和电流波形放大器的输入端。 电压和电流波形放大器的输出电路连接到被测器件，以测试器件对波形的响应。 还公开了一种用于测试设备对模拟电弧状态的响应的方法。 电弧的电压和电流波形以数字形式被捕获。 模拟形式的电压和电流波形由捕获的数字电压和电流波形产生。 将模拟电压和电流波形应用于被测器件，并监控器件以确定其对波形的响应。