GF303D Portable Three Phase AC Voltage And Current Source

Three Phase Voltace Current Source

The GF303D electrical three phase precision power source can also be used to type test 0.1% to 2% energy meters. Choose the GF303D electrical three phase power source when you need the highest accuracy available for calibrating secondary standard meters, energy revenue meters and type test applications.


The model GF303D three phase power source is electric AC voltage, current and power calibrator for calibration of power meters, power transducers, power quality analyzer, current meter, voltage meter and generally all kinds of power measuring devices. AC voltage, current, power functions have calibrated phase shift in frequency range from 40 Hz to 70Hz with resolution as good as 0.001 Hz. It have three channel voltage and three phase current independent output, any programmable setting, low phase shift, high stability 0.01%/1min, as standard three phase voltage source, three phase current source, three phase power source and harmonic source, is a high precision portable calibration tool in electrical laboratory. It can set 3P4W, 3P3W, 1P3W, 1P2W type, forward and reverse outputs, active power and reactive power output.


  • Phase shift from 0-360.000°;
  • Range switching automatically;
  • Programmable by professional users;
  • High accuracy 0.02%, 0.05%, 0.1% optional;
  • 120A can output continuously for a long time;
  • With RS232 interface, PC control software optional;
  • Apply the 32bit MPU + DSP + CPLD, powerful flexible;
  • Display of vector diagram, Symbols according to IEC387;
  • Three channel voltage and three channel current output;
  • Software calibration, simple operation, stable and reliable;
  • Voltage & current output range widely from 0-120A/0-600V/40-70HZ;
  • High-power power source, high stability, waveform distortion degree is small;
  • Big touch screen, 7-inch TFT color LCD display, English menu, operating simply;
  • Hardware PID, fast response, the change of load will not cause output volatility;
  • Over-current, over-voltage, over-heat, shorts-and-opens, overload protection, failure detection automatically;
  • Setting 2-63times harmonics of amplitude and phase, and it can be added to the base wave in every harmonic output;
  • Strong with load ability, capacitive load & resistance of composite type load or load and load regulation is higher than 0.01%;
  • Setting up and take the load regulation of voltage, current, phase angle, frequency and power factor etc; As a high-power current source, voltage source and power source;
  • Industrial frequency waves as high as 5000points/cycle, signal output without filter, precise output waveform, the harmonic output precision, harmonic distortion degree is small;


Electrical parameters 
Accuracy class  0.02%, 0.05%, 0.1%
Power supply Single phase AC 85-265 V, frequency 50/60 Hz
AC Voltage output 
Range (U1, U2, U3 phase) 57.7V/100V/220V/380V; range switch automatically(Max 500V)
Adjust fineness 0.01% RG
Accuracy 0.02% RG, 0.05% RG
Stability <0.01% RG/120s
Distortion degree <0.3% (not capacitive load)
Output power 25VA, 50VA or 100VA
Full load regulation rate 0.01% RG
Full load regulation time Less than 1mS
Long-term stability ± 60 PPM/year
AC Current output 
Range (I1, I2, I3 phase) 0.2A, 1A, 5A, 20A, 100A; range switch automatically
Adjustment range (0-120)%RG
Adjust fineness 0.01% RG
Accuracy 0.02% RG, 0.05% RG
Stability <0.01% RG/120s
Distortion degree <0.3% (not capacitive load)
Output power 50VA, 100VA or 200VA
Full load regulation rate 0.01% RG
Full load regulation time Less than 1mS
Long-term stability ± 60 PPM/year
Power output 
Accuracy 0.02% RG, 0.05% RG
Stability 0.01% RG/120s
Phase angle 
Adjusting range 0.000°-359.999°
Output adjustment fineness 10, 1, 0.1, 0.01 as optional. 
Resolution 0.001°
Accuracy 0.02° or 0.05°
Power factor   
Adjusting range -1 ~ 0 ~ +1
Resolution 0.0001
Accuracy 0.0005
Adjusting range 40.000-70.000 Hz
Output adjustment fineness 5Hz, 1Hz, 0.1Hz, 0.01Hz as optional.
Resolution 0.001 Hz
Accuracy 0.002Hz
Temperature drift ± 0.5 PPM/°C
Long-term stability ± 4 PPM/year
Harmonic accuracy 
Harmonic number 2-63times
Harmonic content 0-40%
Harmonic phase 0°-359.99°
Harmonic phase accuracy < 0.01°
Harmonic set accuracy 0.1% (relative to the base wave ratings)
Communication Port RS232
Programmable controlled Yes
Harmonic Yes
Wiring mode 3P4W, 3P3W, 1P3W, 1P2W
Key 30pcs
LCD 7 inch TFT color touch display
PC control software Optional
Standard IEC 62053-21,22, 23; IEC 60736; ANSI C12.20-2002;
JJG 597-2005; JJG596-2012; JJG 1085-2013; JJF 68-2019;
DL/T 826-2002; DL/T 1478-2015; DL/T 448-2016; JJG 51-1999;
DL/T 2213.1-2021; GJB J 5857-2006; JJG6-2011; JJG70-2015;
Isolation protection IEC 61010-1:2001
Measurement Category 300 V CAT III, 600 V CAT II
Degree of protection IP20
Declaration of conformity CE & CNAS certified
Mechanical parameters 
Dimensions (W×D×H) (mm) 500x600x175
Weight (kg) 12, 15, 18, 20, 25
Environmental conditions 
Working temperature 0°C to 50°C
Storage condition -30°C to -60°C
Relative humidity ≤ 85%

Selection guide

NO. Accuracy Voltage range Current Range Weight
303D1201 0.1% 0-500V 0-120A 25KG
303D12005 0.05% 0-500V 0-120A 25KG
303D12002 0.02% 0-500V 0-120A 25KG
303D501 0.1% 0-500V 0-50A 20KG
303D5005 0.05% 0-500V 0-50A 20KG
303D5002 0.02% 0-500V 0-50A 20KG
303D241 0.1% 0-500V 0-24A 18KG
303D2405 0.05% 0-500V 0-24A 18KG
303D2402 0.02% 0-500V 0-24A 18KG
303D121 0.1% 0-380V 0-12A 15KG
303D1205 0.05% 0-380V 0-12A 15KG
303D1202 0.02% 0-380V 0-12A 15KG
303D61 0.1% 0-380V 0-6A 12KG
303D605 0.05% 0-380V 0-6A 12KG
303D602 0.02% 0-380V 0-6A 12KG

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