At the operating sites of equipment such as pumping units, fans, and pumps, maintenance personnel need to simultaneously record multiple types of electrical parameters including voltage, current, power, and harmonics. Traditional single-function instruments require repeated wiring and time-separated measurements, which is not only time-consuming but also makes it difficult to reflect the operating state at the same moment. According to standards such as GB/T 14549-1993 "Power Quality - Harmonics in Public Supply Network," there are clear requirements for the synchronicity and completeness of power grid parameters. The power quality analyzer is designed precisely to solve such problems.
The instrument can comprehensively capture various electrical parameters during power grid operation. Basic electrical parameters include three-phase voltage, three-phase current, frequency, active power, reactive power, apparent power, and power factor. Harmonic analysis supports harmonic content rates from the 2nd to the 63rd order, total harmonic distortion, and interharmonics. Power quality events can record voltage sags, swells, interruptions, transient impulses, voltage fluctuations, and flicker. For three-phase balance, it can calculate voltage/current unbalance and positive-sequence/negative-sequence/zero-sequence components. Energy metering supports forward/reverse active energy and four-quadrant reactive energy. The dynamic curve function can plot voltage and current waveforms, power trend charts, harmonic spectrum charts, and vector diagrams.
For the operating electrical parameters of 10–80 Hz variable-frequency equipment, the instrument can perform dynamic measurement. The automatic reactive power compensation calculation function can provide the correct compensation amount based on measured data, helping maintenance personnel optimize the compensation scheme. In addition, the instrument can perform full-process dynamic measurement of various electrical equipment for energy-saving analysis. The large-capacity lithium battery pack supports instrument testing without an external power supply, making it suitable for on-site use where no power supply is available. A USB flash drive can record test curve data and store up to 10,000 sets of test data.
The instrument is equipped with a 240-dot matrix LED liquid crystal display, showing graphics and Chinese prompts. It can produce three-phase vector diagrams to visually display the phase relationship between current and voltage, helping maintenance personnel quickly judge wiring and phase status. The overall design focuses on the convenience of on-site operation.
At sites such as pumping units, fans, and pumps, maintenance personnel can obtain multiple parameters such as voltage, current, power, and harmonics synchronously with one-time wiring, avoiding the time consumption and state deviation caused by multiple measurements. It is recommended to use this instrument regularly for dynamic measurement and to establish equipment operating parameter archives to provide data support for energy-saving analysis and reactive power compensation. For variable-frequency equipment, pay attention to verifying the operating electrical parameters within the 10–80 Hz range.
