The detection and location of the start point and end point of the voltage sag and swell is a key problem for the power quality monitoring.
对于短时低电压扰动发生、恢复时刻的检测与定位则是电能质量监测和统计中获取相关指标首先要解决的问题。
By monitoring both voltage and power, the unit measures the normal working load, then calculates and sets an automatic shutdown point for detected power changes.
通过监测动力电压，该装置先对正常的工作量进行测定，然后依据被测动力发生的变化，估计并设定一个自动的关闭点。
By monitoring both voltage and power, the unit measures the normal working load, then calculates and sets an automatic shutdown point for detected power changes.
通过监测动力电压，该装置先对正常的工作量进行测定，然后依据被测动力发生的变化，估计并设定一个自动的关闭点。
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