GF4385 portable power quality analyzer is a low cost PQA carefully developed by GFUVE GROUP and specially designed for field test of three phase system, multi-functional and intelligent, concise man-machine operation.

It is easy to use, large LCD screen display, high resolution, English display, shock-proof shell structure and so on. simultaneously measure 4-channel current (I1 I2 I3 I4 three phase and neutral wire current) and 4-channel voltage (U1 U2 U3 U4 three-phase voltage and neutral line voltage to ground), the peak value of current voltage, maximum/minimum value over a period, three-phase unbalance factor, short-flicker, transformer K factor, active power, reactive power, apparent power, power factor and displacement power factor, active power, reactive power, apparent power, total harmonic distortion and harmonic, etc; Display real-time waveform, harmonic ratio bar charts of current voltage; Dynamically capture instantaneous change of voltage current, monitoring starting current, monitoring the power parameters and generate the alarm list, generate the trend chart for a long time record test data.


  • Alarm function;
  • Snapshot function;
  • Transformer K factor;
  • Vector diagram display;
  • Inrush current monitoring;
  • Transient capture function;
  • The DC components of voltages;
  • Total harmonic distortion (THD);
  • IP65 structural portable design;
  • Peak current and voltage values;
  • Short-term voltage flicker (PST);
  • Three phase unbalance(current and voltage);
  • Trend chart recording and storing function;
  • 10A/100A/1000A/6000A current probe optional;
  • Measurement of each harmonic up to order 50;
  • True RMS values of voltages and currents;
  • Each phase and total active, reactive, apparent power;
  • Each phase and total active, reactive, apparent energy;
  • Power factors (PF) and displacement factors (DPF or COSΦ);
  • Minimum and maximum half-cycle RMS current and voltage values;
  • Waveform real-time display (4 channels voltage/4 channels current);
  • Bar charts show harmonic ratios of current and voltage of each phase;


  • Factory;
  • Oil, Gas company;
  • Power generation;
  • Wind power plant;
  • Power distribution;
  • Power quality audit;
  • Hydroelectric power;
  • Power quality reports;
  • Renewable power plants;
  • Electricity power company;
  • Photovoltaic power station;
  • Uninterruptible power supply;
  • Uninterruptible power supply in healthcare;
  • Recording transients of switching manoeuvers;
  • Effects of power quality issues on living and working environment;