Yes, it usually needs to be installedPower quality monitoringdevice. Adopting DSP+ARM+CPLD core, 5.7 "large screen LCD (320 × 240 dot matrix display screen, making the structure more compact and functions more powerful. The main uses are as follows:

1. Measure and analyze the AC power quality supplied by the public power grid to the user end, including frequency deviation, voltage deviation, voltage fluctuation and flicker, allowable three-phase voltage imbalance, and grid harmonics. Applying wavelet transform to measure and analyze the harmonics of non-stationary time-varying signals. Measure and analyze the impact of various electrical equipment on the power quality of the public power grid under different operating conditions. Regularly record and store the trend of changes in power parameters such as voltage, current, active power, reactive power, frequency, phase, etc.

2. Dynamic monitoring of power equipment adjustment and operation process helps users solve problems that arise during the adjustment and operation of power equipment. Test and analyze the causes of faults such as circuit breaker action, transformer overheating, motor burning, and automatic device malfunction in the power system. Test and analyze the dynamic parameters of reactive power compensation and filtering devices in the power system, and quantitatively evaluate their functions and technical indicators.

3. The characteristics of portability, multi-parameter, large capacity, high precision, and the application of modern signal analysis theory make power quality monitoring devices widely applicable in fields such as transmission and distribution, power electronics, and motor drive. The voltage input adopts a high voltage isolation module, and the current input adopts a high-precision current transformer to isolate the input signal from the measurement system, greatly improving the anti-interference ability.

4. Adopting a Chinese interface and simple button operation, it is convenient for users to use. Meet the requirements of national standard A-level instruments. Reference algorithms are used for harmonics, three-phase imbalance, flicker, and fluctuations, without approximate calculations. High precision A/D (16 bit) is used for simultaneous sampling, with a collection rate of 12.8 kHz.The online power quality monitoring device has a built-in 512M memory, which stores data in units of 5 minutes. Each channel can continuously store historical data for 4 months.

5. System frequency, grid harmonics, three-phase voltage imbalance, voltage fluctuation and flicker, voltage deviation, fundamental effective value and true effective value of voltage, fundamental effective value and true effective value of current, fundamental active power, active power, fundamental apparent power, 2-50 harmonics, true power factor, and other parameters specified in the five national standards for power quality.