Power quality monitoringdeviceTechnical indicators:

1Frequency measurement:Measurement range:forty-five～55HzCenter frequency50HzMeasurement condition: The fundamental component of the signal is not less than80%F.S；measurement error: ≤0.02Hz；Input voltage range:AC10～120V；Input current range:5A；Fundamental voltage and current amplitude: allowable error of fundamental voltage ≤0.5%F.S.; Allowable error of fundamental current ≤1%F.S；Measurement error of phase difference between fundamental voltage and current: ≤zero point five°;Measurement error of harmonic voltage content: ≤0.1%;Measurement error of harmonic current content: ≤0.2%;Three-phase voltage imbalance error: ≤0.2%;Voltage deviation error: ≤0.2%;Voltage variation error: ≤0.2%;Power deviation: ≤5%;Flicker error: ≤5%.

2. Using benchmark algorithms for approximate calculations of harmonics, three-phase imbalance, flicker, and fluctuations, with high accuracyA/D（sixteen Bit), simultaneous sampling, collection rate12.8 kHz, in accordance with national standardsA Level instrument requirements.OnlinePower quality monitoring devicebuilt-in512MMemory to5Store data in minutes, with each channel capable of continuous storage4Historical data for months.supportTCP/IP、RS232、four hundred and eighty-fiveVarious communication methods, including support for ministerial awardsone hundred and three、MODBUSProtocol，Can achieve data upload function。Single or multiple unitsGDDN-500CThe device can be grouped into screens, and an industrial computer can be configured on the screen bodyLEDThe display and backend analysis software form an on-site workstation, which can also remotely transmit all data to the monitoring center.

3. Multiple unitsGDDN-500CThe device can form a remote harmonic monitoring network, transmit all data communication to various workstations or monitoring centers, and achieve remote multi-level monitoring and hierarchical management through backend analysis software.The backend monitoring and analysis system supports: remote setting of site parameters; Can switch to any line of any monitored substation to display real-time data, waveform, and spectrum; Output various functional curves and can scale, translate, and compare the curves;Generate pie and column distribution maps of power quality; Automatically output power quality statistical reports95%Probability value, average value.Power quality monitoring deviceAccording to customer needs, printer functions can be added, and other data and functions can also be added to the backend analysis software.