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programmable three phase source
programmable three phase source
programmable three phase source
programmable three phase source


The GF303DT programmable three phase current and voltage source is one economical three phase power source, it can also be used to test class 1 to 2 energy meters. Choose the GF303DT electrical digital programmable power source when you need the low investment amount for calibrating secondary digital electrical meters, energy revenue meters and type test applications.

DESCRIPTIONThe model GF303DT three phase power source is electric AC voltage, current and power calibrator for calibration of power meters, Ac power transducers, ammeter, voltmeter 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 0.01 Hz. It have three channel current and three channel voltage independent output, any programmable setting, low phase shift, stability 0.05%/1min, and as standard three phase voltage source, three phase current source and three phase power source , is a affordable portable calibration tool in electrical laboratory. It has been widely used in more than 100 countries around the world, including electricity meter manufacturers, electrical measurement equipment R&D enterprises, power engineering service companies, electricity power utilities, electrical laboratory etc.


■ Universities;

■ Energy meter R & D;

■ Energy meter factory;

■ AMI Research institutes;

■ Electrical testing center;

■ Panel meter manufacturers;

■ Power meter manufacturers;

■ Digital meter manufacturers;

■ Pointer meter manufacturers;

■ Railway electrical department;

■ ISO17025 Electrical laboratory;

■ Measurement and control device factory;

■ Electricity power bureau & power company;

■ Power engineering commissioning company;

■ Manufacturer of reactive power compensation device;

■ Electrical Department of industrial and mining enterprises;


■ Range switching automatically;

■ Waveform distortion degree is small;

■ Unique power amplification technology;

■ High-power power source, high stability;

■ Programmable output by professional users;

■ With RS232 interface, PC Software optional;

■ Apply the 32 bit MPU + DSP + CPLD, powerful flexible;

■ Three channel voltage and three channel current output;

■ Software calibration, operation simply, stable and reliable;

■ As a high-power current source, voltage source and power source;

■ 7-inch TFT color touch LCD display, English menu, operating simply;

■ Display of vector diagram, all parameters are displayed on one screen;

■ Voltage & current output range widely from 0-120A/0-500V/40-70HZ/0-360.0°;

■ Over-current, over-voltage, over-heat, shorts-and-opens, overload protection;

■ Hardware PID, fast response, the change of load will not cause output volatility;

■ Setting up and take the load regulation of voltage, current, phase shift, frequency and power factor etc;

■ Strong with load ability, capacitive load & resistance of composite type load or load and load regulation is higher than 0.01%;


Electrical parameters
Accuracy class 0.2%, 0.5%, 1%
Power supply Single phase AC 85-265 V, frequency 50/60 Hz
AC Voltage output
Range (U1, U2, U3 phase) 3×(0-300V), 3×(0-380V), 3×(0-500V)
Adjust fineness 0.01% RG
Accuracy 0.2% RG, 0.5% RG
Stability <0.05% RG/120s
Distortion degree <0.5% (not capacitive load)
Output power 25VA or 50VA
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) 3×(0-6A), 3×(0-12A), 3×(0-24A), 3×(0-50A), 3×(0-120A)
Adjustment range (0-120)%RG
Adjust fineness 0.01% RG
Accuracy 0.2% RG, 0.5% RG
Stability <0.05% RG/120s
Distortion degree <0.5% (not capacitive load)
Output power 50VA or 100VA
Full load regulation rate 0.01% RG
Full load regulation time Less than 1mS
Long-term stability ± 60 PPM/year
Power output
Accuracy 0.2% RG, 0.5% RG, 1%RG
Stability 0.05% RG/120s
Phase angle
Adjusting range 0.000°-359.999°
Output adjustment fineness 10, 1, 0.1, 0.01 as optional.
Resolution 0.1°
Accuracy 0.2°, 0.5°, 1°
Power factor
Adjusting range -1 ~ 0 ~ +1
Resolution 0.001
Accuracy 0.005
Adjusting range 40.00-70.00 Hz
Output adjustment fineness 5Hz, 1Hz, 0.1Hz, 0.01Hz as optional.
Resolution 0.01 Hz
Accuracy 0.02Hz
Temperature drift ± 0.5 PPM/°C
Long-term stability ± 4 PPM/year
Communication Port RS232
Programmable controlled output Yes
Key 30pcs
Voltage & current amplitude setting(Range) 0.01%, 0.1%, 1%, 10%
Testing point 0.5C, 0.5L, 0.8C, 0.8L, 1
Testing type 1P2W, 1P3W, 3P3W, 3P4W
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
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%


NO. Accuracy Voltage range Current Range Weight
303DT120-0.2 0.2% 0-500V 0-120A 25KG
303DT120-0.5 0.5% 0-500V 0-120A 25KG
303DT120-1 1% 0-500V 0-120A 25KG
303DT120-1 1% 0-500V 0-120A 25KG
303DT50-0.2 0.2% 0-500V 0-50A 20KG
303DT50-0.5 0.5% 0-500V 0-50A 20KG
303DT50-1 1% 0-500V 0-50A 20KG
303DT24-0.2 0.2% 0-500V 0-24A 18KG
303DT2405 0.05% 0-500V 0-24A 18KG
303DT24-1 1% 0-500V 0-24A 18KG
303DT12-0.2 0.2% 0-500V 0-12A 15KG
303DT12-0.5 0.5% 0-500V 0-12A 15KG
303DT12-1 1% 0-500V 0-12A 15KG
303DT6-0.2 0.2% 0-500V 0-6A 12KG
303DT6-0.5 0.5% 0-500V 0-6A 12KG
303DT6-1 1% 0-500V 0-6A 12KG