Power quality monitoringdeviceMain indicators:

Voltage deviation, frequency deviation, three-phase voltage imbalance, voltage fluctuation and flicker, harmonics in the public power grid and harmonics between public power grids, etc.China has also issued six corresponding standards for power quality, namely:GB/T12325-2008 Power quality Supply voltage deviation；GB/T15945-2008 Power quality Power system frequency deviation;GB/T15543-2008 Power quality three-phase voltage imbalance;GB/T12326-2008 Voltage fluctuations and flickers in power quality;GB/T14549-1993 Power quality: Harmonics in public power grids;GB/T24337-2009 Power quality - Harmonics between public power grids

Electricity quality refers to the quality of electricity in the power system. The ideal electrical energy should be a symmetrical sine wave. Some factors can cause the waveform to deviate from the symmetrical sine, resulting in power quality issues.Power quality monitoring deviceStrictly speaking, the main indicators for measuring power quality include voltage, frequency, and waveform. In a general sense, it refers to power supply, including four related terms and concepts: voltage quality, current quality, power supply quality, and power consumption quality.