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    • 1. 发明申请
    • SERIES ARC FAULT CURRENT INTERRUPTER APPARATUS
    • 系列ARC故障电流中断器
    • US20090168277A1
    • 2009-07-02
    • US11965888
    • 2007-12-28
    • Sriram ChangaliVijaysai PrasadCecil Rivers,, JR.Pradeep Vijayan
    • Sriram ChangaliVijaysai PrasadCecil Rivers,, JR.Pradeep Vijayan
    • H02H3/00
    • H02H1/0015H02H1/0092
    • A circuit interrupter for interrupting alternating current electrical signal on a line conductor of a circuit feeding a load, including: an electrical contact in operatively connected in series with the line conductor; a trip mechanism for selectively opening the electrical contact when activated; a current sensor connected in series with the line conductor for obtaining a sample alternating current electrical signal from the circuit feeding the load; a microprocessor in electrical communication with the trip mechanism and comprising a series arc fault detection program resident thereon; the series arc detection program comprising a discrete wavelet transform for determining the presence of a series arc fault current in the circuit feeding the load; wherein, when the discrete wavelet transform determines the presence of a series arc fault, the microprocessors signals the trip mechanism to activate and open the electrical contact in operatively connected in series with the line conductor.
    • 一种用于中断馈电负载的电路的线路导体上的交流电信号的电路断路器,包括:与所述线路导体串联操作地连接的电触点; 用于当激活时选择性地打开电触点的跳闸机构; 与线路导体串联连接的电流传感器,用于从馈电负载的电路得到样品交流电信号; 与所述跳闸机构电通信并包括驻留在其上的串联故障检测程序的微处理器; 所述串联电弧检测程序包括用于确定在馈送负载的电路中存在串联电弧故障电流的离散小波变换; 其中,当所述离散小波变换确定串联电弧故障的存在时,所述微处理器向所述跳闸机构发出信号以激活并打开与所述线路导体串联操作地连接的所述电触头。
    • 3. 发明授权
    • Directional zone select interlock method
    • 定向区选择互锁方式
    • US08207742B2
    • 2012-06-26
    • US12347570
    • 2008-12-31
    • Anupam Vinodkumar SawhneySriram ChangaliRadoslaw NarelMarcelo Esteban Valdes
    • Anupam Vinodkumar SawhneySriram ChangaliRadoslaw NarelMarcelo Esteban Valdes
    • G01R31/08H02H3/00
    • H02H7/262H02H3/38
    • An improved method to detect and locate electrical faults is provided. A method of operating a circuit breaker in an electrical circuit configured with at least one of a first main circuit breaker at a first layer of circuit protection having a first direction of current flow, and at least one second circuit breaker downstream of said at least one first main circuit breaker having a second direction of current flow, and at least one third circuit breaker downstream of said at least one second circuit breaker having a third direction of current flow, wherein one of said at least one first, second, or third circuit breakers is in short time pick-up, is provided, and comprises steps to determine the location of the fault and adjust the trip time delay of the circuit breakers according to predetermined criteria.
    • 提供了一种检测和定位电气故障的改进方法。 一种在电路中操作断路器的方法,该电路配置有具有第一电流方向的第一电路保护层的第一主断路器和至少一个第二电路断路器 具有第二电流方向的第一主断路器以及具有第三电流方向的所述至少一个第二断路器下游的至少一个第三断路器,其中所述至少一个第一,第二或第三电路中的一个 断路器在短时间内提供,并且包括确定故障位置的步骤,并根据预定标准调节断路器的跳闸时间延迟。
    • 4. 发明授权
    • Parallel arc detection using discrete wavelet transforms
    • 使用离散小波变换的平行弧检测
    • US08170816B2
    • 2012-05-01
    • US12344772
    • 2008-12-29
    • Sriram ChangaliJohn Kenneth HookerKonstantin V. GrigoryanScott Jeffrey Hall
    • Sriram ChangaliJohn Kenneth HookerKonstantin V. GrigoryanScott Jeffrey Hall
    • G01R31/00
    • H02H1/0015H02H1/0092H02H3/08
    • An apparatus to perform parallel arc fault current interruption (AFCI) is provided. The apparatus includes a current sensing device disposed in the electrical circuit, a detection unit configured to receive an output signal produced by the current sensing device and to output a secondary signal based on the output signal, a microcontroller coupled to the detection unit, configured to receive and to decompose the secondary signal via discrete wavelet transforms to thereby obtain discrete wavelet coefficients, to compute a sum of the discrete wavelet coefficients, and to compare the sum of the discrete wavelet coefficients to a predetermined threshold, and to generate a trip signal when the sensed load current is above a predetermined threshold and the sum of the discrete wavelet coefficients cooperatively indicate that predetermined threshold conditions are satisfied.
    • 提供了一种并行电弧故障电流中断(AFCI)的设备。 该装置包括设置在电路中的电流感测装置,检测单元,被配置为接收由电流感测装置产生的输出信号并基于输出信号输出次级信号;耦合到检测单元的微控制器,被配置为 通过离散小波变换接收和分解辅助信号,从而获得离散小波系数,以计算离散小波系数的和,并将离散小波系数的和与预定阈值进行比较,并产生跳闸信号,当 感测的负载电流高于预定阈值,并且离散小波系数的和协同地指示满足预定的阈值条件。
    • 6. 发明申请
    • ARC DETECTION USING DETAILED AND APPROXIMATE COEFFICIENTS FROM DISCRETE WAVELET TRANSFORMS
    • 使用离散小波变换的详细和大致系数的弧检测
    • US20100157488A1
    • 2010-06-24
    • US12341166
    • 2008-12-22
    • Scott Jeffrey HallJohn Kenneth HookerKonstantin Vladimir GrigoryanSriram Changali
    • Scott Jeffrey HallJohn Kenneth HookerKonstantin Vladimir GrigoryanSriram Changali
    • H02H3/08
    • H02H1/0015H02H1/0092
    • An apparatus for facilitating interruption of current in an electrical circuit is provided and includes a current sensing device in the electrical circuit to service an electrical load, the current sensing device being productive of an output signal representative of a load current passing therethrough, a detection unit, in signal communication with the current sensing device such that the output signal is received by the detection unit, the detection unit being configured and disposed to output a secondary signal based on the output signal, and a microcontroller to receive and to decompose the secondary signal into detailed and approximate coefficients, and to generate a trip signal for use in interrupting an operation of the electrical circuit when a current of the sensed load is above a predetermined threshold and the detailed and approximate coefficients cooperatively indicate that threshold conditions for trip signal generation are satisfied.
    • 提供一种用于促进电路中的电流中断的装置,并且包括用于维持电负载的电路中的电流感测装置,所述电流感测装置产生代表通过其的负载电流的输出信号,检测单元 与所述电流检测装置进行信号通信,使得所述输出信号由所述检测单元接收,所述检测单元被配置和设置为基于所述输出信号输出辅助信号,以及微控制器,用于接收和分解所述辅助信号 成为详细的和近似的系数,并且当感测负载的电流高于预定阈值时产生用于中断电路的操作的跳闸信号,并且详细和近似系数协同地指示用于跳闸信号产生的阈值条件是 满意。
    • 7. 发明授权
    • Arc detection using detailed and approximate coefficients from discrete wavelet transforms
    • 使用离散小波变换的详细和近似系数进行电弧检测
    • US08159793B2
    • 2012-04-17
    • US12341166
    • 2008-12-22
    • Scott Jeffrey HallJohn Kenneth HookerKonstantin Vladimir GrigoryanSriram Changali
    • Scott Jeffrey HallJohn Kenneth HookerKonstantin Vladimir GrigoryanSriram Changali
    • H02H3/00
    • H02H1/0015H02H1/0092
    • An apparatus for facilitating interruption of current in an electrical circuit is provided and includes a current sensing device in the electrical circuit to service an electrical load, the current sensing device being productive of an output signal representative of a load current passing therethrough, a detection unit, in signal communication with the current sensing device such that the output signal is received by the detection unit, the detection unit being configured and disposed to output a secondary signal based on the output signal, and a microcontroller to receive and to decompose the secondary signal into detailed and approximate coefficients, and to generate a trip signal for use in interrupting an operation of the electrical circuit when a current of the sensed load is above a predetermined threshold and the detailed and approximate coefficients cooperatively indicate that threshold conditions for trip signal generation are satisfied.
    • 提供一种用于促进电路中的电流中断的装置,并且包括用于维持电负载的电路中的电流感测装置,所述电流感测装置产生代表通过其的负载电流的输出信号,检测单元 与所述电流检测装置进行信号通信,使得所述输出信号由所述检测单元接收,所述检测单元被配置和设置为基于所述输出信号输出辅助信号,以及微控制器,用于接收和分解所述辅助信号 成为详细的和近似的系数,并且当感测负载的电流高于预定阈值时产生用于中断电路的操作的跳闸信号,并且详细和近似系数协同地指示用于跳闸信号产生的阈值条件是 满意。