The GF438II IEC Class A handheld power quality analyzer integrates a full suite of core grid diagnostic tools in one lightweight unit, eliminating the need to carry multiple separate testers for on-site power audits. Covering five core testing modules including harmonic spectrum analysis, three-phase unbalance calculation, high-speed waveform capture, long-term trend logging and standard flicker evaluation, the device enables seamless switching between all measurement modes without repeated wiring or parameter reconfiguration.
Compliant with IEC 61000-4-7 harmonic standards, it resolves up to 63rd voltage and current harmonics alongside interharmonics and high-frequency harmonics, visualizing distortion levels via intuitive histogram displays to trace harmonic pollution from inverters and nonlinear loads. For unbalance testing, it calculates positive, negative and zero sequence components to quantify voltage and current unbalance rates with industry-leading precision, ideal for troubleshooting uneven factory load distribution and new energy combiner cabinets.
Equipped with a 200kHz high-speed sampling chip, the instrument captures full-cycle transient waveforms during load switching, motor startup and voltage sag/swell incidents, storing complete wave traces for post-fault analysis. Its built-in logger module continuously records all electrical indicators at custom intervals and generates continuous trend curves, while the dedicated flicker module strictly follows IEC 61000-4-15 to compute PST 10-minute and PLT 2-hour flicker values for grid compliance verification.
Beyond core power quality tests, the unit also supports real-time power parameter readout, event snapshot recording and patented energy loss computation to quantify financial losses caused by distortion and imbalance. All stored waveform, harmonic, unbalance, trend and flicker datasets can be exported via USB and processed with matched GFUVEPQA PC software to generate unified, standardized power quality inspection reports. With CAT IV 600V safety certification and over 6 hours of continuous battery runtime, it serves as an all-in-one inspection solution for power utilities, photovoltaic plants, wind farms and industrial manufacturing facilities.
Learn more: https://www.gfuvegroup.com/power-quality-analyzer/three-phase-power-quality-analyzer.html
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