Online Power Quality Monitoring Device
DARUI Electric recommends
Product Overview:
With the vigorous development of China's national economy, the power load has increased sharply, especially the continuous growth of impact and nonlinear load capacity, causing power quality problems such as waveform distortion, voltage fluctuation and flicker, and three-phase unbalance in the power grid. The CXRD-DZ2000 power quality monitoring device (hereinafter referred to as CXRD-DZ2000) launched by the company is a multifunctional power quality testing and analysis instrument. It adopts DSP+ARM+CPLD core, 5.7" large-screen LCD (320×240 dot matrix) display, making the structure more compact and operation simple.
Main Uses:
Measure and analyze the AC power quality supplied from the public power grid to the user end. Its measurement and analysis include:
1. Real-time electrical parameters: including three-phase voltage, three-phase current, power grid frequency, active power, reactive power, power factor, etc.
2. Three-phase voltage deviation.
3. Frequency deviation.
4. Three-phase voltage unbalance.
5. Voltage positive sequence, negative sequence, zero sequence components; current positive sequence, negative sequence, zero sequence components.
6. Three-phase voltage fluctuation and flicker.
7. Total three-phase voltage distortion rate, 2-50th voltage harmonics.
8. Total three-phase current distortion rate, 2-50th current harmonics.
Main Features:
1. Apply wavelet transform to measure and analyze harmonics of non-stationary time-varying signals.
2. Measure and analyze the power quality of various electrical equipment under different operating conditions on the public power grid.
3. Load fluctuation monitoring: regularly record and store the trend of changes in electrical parameters such as voltage, current, active power, reactive power, apparent power, frequency, phase, etc.
4. Dynamic monitoring of power equipment adjustment and operation process, helping users solve problems during equipment adjustment and commissioning.
5. Test and analyze fault causes such as circuit breaker operation, transformer overheating, motor burnout, and automatic device misoperation in the power system.
6. Test and analyze the dynamic parameters of reactive power compensation and filtering devices in the power system and make quantitative evaluation of their functions and technical indicators.
7. Features such as portability, multi-parameter, large capacity, high precision, and application of modern signal analysis theory enable CXRD-DZ2000 to be widely used in power transmission and distribution, power electronics, motor drive and other fields.
Technical Parameters:
1. Frequency measurement
Measurement range: 45～55Hz, center frequency 50Hz, measurement conditions: signal fundamental component not less than 80％F.S.
Measurement error: ≤0.02Hz
2. Input voltage range: 10-120V
3. Input current range: 5A
4. Fundamental voltage and current amplitude: fundamental voltage allowable error ≤0.5％F.S.; fundamental current allowable error ≤1％F.S.
5. Measurement error of phase difference between fundamental voltage and current: ≤0.5°
6. Harmonic voltage content rate measurement error: ≤0.1％
7. Harmonic current content rate measurement error: ≤0.2％
8. Three-phase voltage unbalance error: ≤0.2％
9. Voltage deviation error: ≤0.2％
10. Voltage variation error: ≤0.2％
11. Power deviation: ≤5％
12. Flicker error: ≤5％
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