GF303 Program-controlled three phase standard power source

standard power source

GF303 Program-controlled three phase AC standard power source is a high precision three phase AC standard current source and AC standard voltage source. According to DL/T 2213.1-2021 AC standard power source Part 1:General requirements. It is suitable for power department, metrology department, quality control department, research units, institutions of higher learning, electric energy meter, power distribution terminals, power supply management, load control, power quality, reactive power compensation device and the production of enterprise etc.



  • Range switching automatically;
  • 40Hz to 400Hz version optional;
  • Waveform distortion degree is small;
  • With RS232 interface, and PC connection;
  • Meeting ISO17025 electrical laboratory standard;
  • Apply the 32 bit MPU + DSP + FPGA, powerful flexible;
  • Voltage, current output range widely, big power, high stability;
  • Frequency value is adjustable (AB and phase C) from 40Hz to 65Hz;
  • Using software self-calibration, simple operation, stable and reliable;
  • Taking place machine software, it can be output through the PC software program;
  • It can be used as AC current source, AC voltage source or standard power source;
  • Using hardware PID, fast response, the change of load will not cause output volatility;
  • Have big screen, 8.4 inch TFT LCD display, Chinese or English interface, operating simply;
  • To set up and take the load regulation of voltage, current, phase angle, frequency and power factor;
  • Setting 2-63 times of the amplitude and phase harmonics, and it can be added to the base wave in every harmonic output;
  • Have perfect over-current, over-voltage, heat, a shorts-and-opens, overload protection, failure detection automatically;
  • Strong with load ability, but it can take capacitive, sensibility, resistance of composite type load or load and load regulation is higher than 0.01%;
  • Industrial frequency waves as high as 50000 sampling points per cycle, signal output without filter, precise output waveform, the harmonic output precision, harmonic distortion degree is small;


  • Universities;
  • Energy meter R & D;
  • Energy meter factory;
  • AMI Research institutes;
  • National Metrology center;
  • Electrical testing center;
  • Panel meter manufacturers;
  • Power meter manufacturers;
  • Digital meter manufacturers;
  • Pointer meter manufacturers;
  • Railway electrical department;
  • ISO17025 Electrical laboratory;
  • Power engineering commissioning company;
  • Electricity power bureau & power company;
  • Measurement and control device factory;
  • Manufacturer of reactive power compensation device;
  • Electrical Department of industrial and mining enterprises;


Electrical parameters 
Accuracy class  0.05%, 0.1%
Power supply Single phase AC 85V-265V, 50/60 Hz
AC Voltage output 
Range (U1, U2, U3 phase) 57.7V/100V/220V/380V, switch automatically (max 420V)
Adjustment resolution 0.01%, 0.1%, 1%, 10%
Accuracy 0.05% RG
Stability 0.005% RG/1min
Distortion degree better than 0.1% (not capacitive load)
Load Capacity 25VA
Full load regulation rate Less than 0.01% RG
Full load regulation time Less than 1mS
Temperature drift 8 PPM / °C
Long-term stability 60 PPM/year
AC Current output 
Range (I1, I2, I3 phase) 0.1/0.25A/0.5A/1A/5A/10A/20A, switch automatically
Adjustment resolution 0.01%, 0.1%, 1%, 10% 
Accuracy 0.05% RG
Stability 0.005% RG/1min
Distortion degree better than 0.1% (not capacitive load)
Load capacity 25VA
Full load regulation rate Less than 0.01% RG
Full load regulation time Less than 1mS
Temperature drift 8 PPM/°C
Long-term stability 60 PPM/year
Power output 
Active power accuracy 0.05%
Reactive power accuracy 0.1%
Stability 0.005% RG/1min
Range 0°-359.99°
Adjustment resolution 0.01°, 0.1°, 1°, 10°
Accuracy 0.03° or 0.05°
Power factor   
Adjusting range -1.00000 to 0 to +1.00000
Resolution 0.0001
Accuracy 0.0005
Range 40-65Hz or 40-400Hz (option)
Adjustment resolution 0.001Hz, 0.01Hz, 0.1Hz, 1Hz
Accuracy 0.002Hz
Temperature drift 0.5PPM/°C
Long-term stability 4 PPM/year
Harmonic times 2-63
Adjustment resolution 0.1% (compared with fundamental wave)
Harmonic content (compared with fundamental wave)
Voltage ≤40%
Current ≤40%
Phase 0°-360°
Capacitive load capacity   
0 - 280 V 1uF 
280 - 420 V 0.6uF
Communication Port RS232
Programmable controlled Yes
Harmonic Yes
Wiring mode 3P4W, 3P3W, 1P2W
Key 40pcs
LCD 8.4 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) 450x380x160
Weight (kg) 18
Environmental conditions 
Working temperature 0°C to 50°C
Storage conditions -30°C to 60°C
Relative humidity ≤85%

Selection guide

No. Accuracy Voltage range Current range Weight Remark
303061 0.1% 0-300V 0-6A 12KG 
3030605 0.05% 0-300V 0-6A 12KG 
303121 0.1% 0-420V 0-12A 13.5KG  
3031205 0.05% 0-420V 0-12A 13.5KG  
303201 0.1% 0-420V 0-20A 18KG 
3032005 0.05% 0-420V 0-20A 18KG 
303H061 0.1% 0-300V 0-6A 15KG  XP system
303H0605 0.05% 0-300V 0-6A 15KG  XP system
303H121 0.1% 0-420V 0-12A 18KG  XP system
303H1205 0.05% 0-420V 0-12A 18KG  XP system
303H201 0.1% 0-420V 0-20A 20KG  XP system
303H2005 0.05% 0-420V 0-20A 20KG  XP system

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