Arc fault detection technique
    24.
    发明申请
    Arc fault detection technique 失效
    电弧故障检测技术

    公开(公告)号:US20070058304A1

    公开(公告)日:2007-03-15

    申请号:US11225585

    申请日:2005-09-13

    IPC分类号: H02H3/00

    CPC分类号: H02H1/0015 H02H1/04 H02H3/44

    摘要: An apparatus and a method of detecting arc faults that have reduced susceptibility to nuisance tripping. The apparatus includes a current sensor, a differential current input sense circuit, a differential current (di/dt) characteristics sense circuit, an absolute current input sense circuit, an absolute current characteristics sense circuit, a power supply, a tripping circuit, a processing unit, and an electromechanical interface. The di/dt characteristics sense circuit provides information relating to the characteristic di/dt signature of a power line current. The absolute current characteristics sense circuit provides information relating to the absolute current waveform characteristics of the power line current. The processing unit correlates the di/dt characteristics to the absolute current characteristics to distinguish between electrical arc faults and nuisance loads, thereby reducing the susceptibility of the apparatus to nuisance tripping.

    摘要翻译: 一种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,差分电流输入检测电路,差分电流(di / dt)特性检测电路,绝对电流输入检测电路,绝对电流特性检测电路,电源,跳闸电路,处理 单元和机电接口。 di / dt特性检测电路提供与电力线电流的特征di / dt特征相关的信息。 绝对电流特性检测电路提供与电力线电流的绝对电流波形特性有关的信息。 处理单元将di / dt特性与绝对电流特性相关联,以区分电弧故障和噪声负载,从而降低设备对故障跳闸的敏感性。

    Method for detecting arc faults
    25.
    发明授权
    Method for detecting arc faults 有权
    电弧故障检测方法

    公开(公告)号:US07190562B2

    公开(公告)日:2007-03-13

    申请号:US10937487

    申请日:2004-09-09

    IPC分类号: H02H3/00

    CPC分类号: H02H1/0015 H02H1/0092

    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: 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。 电流传感器监测包括AC电流的功率输入,并提供高频分量。 交流电流到输入检测电路。 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。

    Apparatus for detecting arc faults
    26.
    发明授权
    Apparatus for detecting arc faults 有权
    电弧故障检测装置

    公开(公告)号:US07190561B2

    公开(公告)日:2007-03-13

    申请号:US10937486

    申请日:2004-09-09

    IPC分类号: H02H3/00

    CPC分类号: H02H1/0015 H02H1/04

    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: 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。 电流传感器监测包括AC电流的功率输入,并提供高频分量。 交流电流到输入检测电路。 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。

    TRAVEL SAVINGS ASSESSMENT
    28.
    发明申请
    TRAVEL SAVINGS ASSESSMENT 有权
    旅行保存评估

    公开(公告)号:US20060069592A1

    公开(公告)日:2006-03-30

    申请号:US11161489

    申请日:2005-08-05

    IPC分类号: G06Q10/00

    CPC分类号: G06Q50/14 G06Q10/02 G06Q40/00

    摘要: A method and system for travel savings assessment is disclosed. The invention analyzes the total travel spend of an entity with many members, employees, or other personnel who incur travel costs using various metrics, estimates the savings that may be achieved by known or new entities, calculates and produces periodic reports that track an entity's progress towards obtaining the estimated savings, and can also estimate the potential savings of an entity.

    摘要翻译: 公开了旅行储蓄评估的方法和系统。 本发明分析了一个实体与许多成员,员工或其他使用各种指标出现旅行费用的人员的总旅行支出,估计已知或新实体可能实现的节省量,计算并生成跟踪实体进度的定期报告 获得估计的储蓄,并且还可以估计一个实体的潜在节约。