GF333V2 Three phase power and energy reference standard

power and energy reference standard

GF333V2 three phase reference energy meter is a reference energy and power standard with the characteristics of wide-range 240A/600V, multifunction and high-precision. It has accuracy class of 0.02. By adopting techniques of 32bit DSP, embedded system and automatic temperature balancing and other compensation, it has not only advantages of light weight, small size, high precision, high performance, powerful function, original interface, ease-to-use, but also work stability. It has been designed for universal laboratory and test applications and is intended for checking and the calibration of reference standards for electrical power and energy. In addition, it can be integrated into meter or reference standard test systems of higher accuracy for test bench.


This model GF333V2 three phase reference standard can be widely used in fields of electric energy measuring, electric energy laboratories and other relevant industry, not only in ISO17025 electrical laboratories but also at the industrial field.


  • Vector diagram function;
  • Wide range 0-600V/0-240A;
  • With PC software optional;
  • Waveform display function;
  • Suit for testing in the lab;
  • Energy accumulating function;
  • Measuring 2nd~63rd harmonics;
  • Three channel energy pulse input;
  • High accuracy class up to 0.02%;
  • High stability, high reliability;
  • With stability measurement function;
  • With distortion measurement function;
  • As a three phase reference standard;
  • High resolution 7 inch touch TFT LCD;
  • Metal structure, strong and reliable;
  • As three single phase reference meter;
  • Pulse constant output can be programmable;
  • Fully automatic switching of all measuring ranges;
  • All measuring parameters are displayed on one screen;


  • Power plant;
  • AMI design center;
  • Energy meter R & D;
  • Electrical laboratory;
  • Watt-hour meter factory;
  • Power meter manufacturer;
  • Metrological service center;
  • ISO17025 electrical laboratory;
  • Electricity meter manufacturers;
  • Laboratories of power utilities;
  • Meter test bench integrated factory;
  • Electricity power bureau & power company;
  • National Metrology and testing department;
  • Electrical Department of industrial and mining enterprises;


Electrical parameters 
Accuracy class  0.02%, 0.04%, 0.05%
Power supply 220V±10% or 110V±10%, 50/60Hz
Power consumption 30VA
Voltage measurement(U1 U2 U3 UN) 
Range 0-600.000V
Error ±0.02% (40V-600V)
±0.05% (5V-40V)
Harmonic 2nd-63st
Current measurement(I1 I2 I3) 
Range (direct connection) 1mA-120.000A; 1mA-240.000A
Error (direct connection) ±0.02% (10mA-120A) or (10mA-240A)
±0.05% (1mA-10mA)
Harmonic 2nd-63st
Power measurement error 
Active power ±0.02% (0.01A-120A) or (0.01A-240A)
±0.05% (0.001A-0.01A)
Reactive power ±0.05% (0.001A-120A) or (1mA-240A)
Energy measurement error 
Active energy ±0.02% (0.01A-120A) or (10mA-240A)
±0.05% (0.001A-0.01A)
Reactive energy ±0.05% (0.001A-120A) or (1mA-240A)
Phase angle 
Range 0°-360.000°
Resolution 0.005°
Error ±0.01°
Power factor 
Range -1.00000-0-1.00000
Resolution 0.00005
Error 0.00001
Range 40.0000-70.0000Hz
Resolution 0.0005
Error ±0.001
Pulse output 
Output channel 3
Energy pulse constant 1-9999999; programmable
Pulse ratio 1:1
Output level 5V
Output rated frequency 60KHz, max 86.4KHz
Pulse input 
Input channel 3
Input level 5-24V or 3-12V
Input frequency Max. 2MHz
LCD Display 7" inch 800x480 pixel touch TFT
Vector diagram Yes
Waveform Yes
Energy accumulation Yes
Distortion measurement Yes
Stability measurement Yes
Self-calibration Yes
Data storage Yes
PC software Optional
Communication port RS232, USB
Standard IEC 62053-21,22, 23; IEC 60736; IR46; ANSI C12.20-2022;
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 IP40
Declaration of conformity CE & CNAS certified
Mechanical parameters 
Dimensions (W×H×D) (mm) 355×185×145 or 445×220×152
Weight (kg) 7.5 or 10
Environmental conditions 
Ambient temperature 0°C to 40°C
Storage temperature -20°C to 65°C
Relative humidity 10%-85%
Temperature coefficient ≤0.0005% /℃
Influence of external fields ≤0.05 %/mT

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