Low cost apparatus and methods of detecting arc faults for better discriminating electrical events. The arc fault detection apparatus includes a current sensor, a di/dt input sense circuit, a dv/dt input sense circuit, and a processing unit. The current sensor monitors a power line current, and provides high frequency components of the power line current to the di/dt input sense circuit. The dv/dt input sense circuit monitors a power line voltage. The di/dt and dv/dt input sense circuits generate signals carrying information relating to changes in the power line current and the power line voltage, respectively. The processing unit analyzes these changes in the power line current and the power line voltage to discriminate detected electrical arcing events from nuisance loads with increased accuracy.
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机译:低成本的检测电弧故障的设备和方法,以更好地区分电气事件。电弧故障检测设备包括电流传感器,di / dt输入感测电路,dv / dt输入感测电路和处理单元。电流传感器监视电源线电流,并将电源线电流的高频分量提供给di / dt输入检测电路。 dv / dt输入检测电路监视电源线电压。 di / dt和dv / dt输入感测电路生成信号,分别承载与电源线电流和电源线电压变化有关的信息。处理单元分析电源线电流和电源线电压中的这些变化,以更高的精度将检测到的电弧事件与有害负载区分开。
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