Power quality on-line monitoring system

The power quality monitoring device produced by our company adopts 32-bit DSP processor, which is a power quality monitoring device with high-speed sampling, calculation, analysis, statistics, communication and display. Real-time monitoring of power grid up to 63 harmonic content, total harmonic distortion, three-phase voltage unbalance, flicker, voltage deviation, voltage fluctuation, frequency, each harmonic active power, reactive power, true power factor, phase shift power factor, true RMS, positive and negative sequence and other power quality indicators.

Technical parameter

◆ AC :220V soil 10%; 50Hz = 0.5Hz; The harmonic distortion rate is not more than 15%

◆ DC :220V soil 10%, ripple coefficient is not more than 5%

◆ Current signal input mode: current transformer input;

◆ Measuring range :AC 200mA~5A;

◆ Overload capacity :1.2In continuous work;

2In allows 1s.

◆ Voltage signal input: voltage transformer input;

◆ Measuring range :AC 0.5V~450V;

◆ Overload capacity :1.3Un continuous work;

1.4Un allows 1S.

Accuracy of monitoring index

◆ Voltage, current :0.2%;

◆ Power, power factor :0.5%;

◆ Frequency deviation :0.01Hz;

◆ Voltage deviation :0.29%;

◆ Overload capacity :1.2In continuous work;

◆ Three-phase voltage unbalance :0.2%;

◆ Three-phase current unbalance :0.5%;

◆ Harmonics: in line with GB/T 14549-1993 Appendix D A requirements;

◆ Intermediate harmonics: refer to /T 14549-1993 Appendix D for harmonics level A;

◆ Flicker :5%;

◆ Voltage fluctuation :5%.

Switching output

◆ Working voltage: AC220V/DC30V

◆ Input mode: null contact or active contact