GDPQ-5000 Power Quality Analyzer is a comprehensive test instrument carefully developed by our company and specially designed for field testing of three-phase systems. It is multi-functional, intelligent, and features a concise human-machine interface. It is easy to use, with a large LCD screen display, high resolution, bilingual interface in both Chinese and English, and a shock-proof shell structure. It can simultaneously measure 4-channel current (ABC three-phase and neutral wire current), 4-channel voltage (ABC three-phase voltage and neutral line voltage to ground), the peak value of current and voltage, maximum/minimum values over a period, three-phase imbalance factor, short-time voltage flicker, transformer K factor, active power, reactive power, apparent power, power factor and displacement power factor, active energy, reactive energy, apparent energy, total harmonic distortion and harmonics, etc. It displays real-time waveforms and harmonic ratio bar charts of current and voltage. It dynamically captures instantaneous changes in voltage and current, monitors starting current, monitors power parameters, generates alarm lists, and generates trend charts for long-term recording of test data.

GDPQ-5000 Power quality analyzer adopts DSP + ARM dual processor architecture. DSP is used for data collection and algorithm processing, while ARM is used for communication protocol and human-machine interface processing. Analog signal acquisition is performed by two AD7655 chips from ADI company. The resolution of AD7655 is 16 bits, and it supports 4-channel synchronous sampling. The highest sampling rate can reach 1 MSPS, ensuring channel accuracy and information integrity, without missing any transient changes in the power grid, and enabling more accurate detection of transient waveform surges and sags, as well as instantaneous waveform interruptions. The DSP operating frequency exceeds 200 MHz, allowing timely monitoring of the power grid and dynamic adjustment of the sampling frequency to achieve synchronization between power frequency and sampling frequency. A 5.6-inch LCD color screen is used for display, with a resolution of 640 dots x 480 dots, and different display colors differentiate phase parameters, waveforms, vector diagrams, and harmonic ratios, enabling users to understand the state of power grid parameters more efficiently and intuitively. The built-in flash memory can store 60 groups of screenshots simultaneously, 150 groups of captured transient voltage/current waveform figures, and 12,800 groups of alarm records. The starting current detection mode can continuously capture the starting current waveform for 100 seconds. A built-in 2G memory card stores trend curve records, simultaneously recording 20 parameters (selectable as needed) with data collected once every five seconds, and trend curve records can be stored for 300 days.

It is also called Intelligent Three Phase Power Quality Analyser, Multifunctional Power Quality Analyser, which simultaneous with the functions of harmonic analyser, phase volt-ampere meter, electric parameter tester. It apply to electricity industry, petrochemical, metallurgy, railway, mining enterprises, scientific research institution, metrological department. Especially suitable for comprehensive analysis and diagnosis on all the voltage, current, power, power, harmonic, phase electric parameters.