PQube User Manual 2.1
Page 29 of 113
Potential_Transformer_Ratio=100:1
Note that, if you choose to set the nominal voltage in your PQube’s Setup.ini file, you would set
Nominal_Phase_To_Neutral_Voltage=24000
even though the voltage at your PQube’s terminals is 240 volts nominal.
Potential Transformers with Calibrated Ratios
In Firmware 2.1, you can now apply a gain correction factor for the mains voltage terminals, with a
range of 0.95 to 1.05. Use with calibrated potential transformers to improve the accuracy of your
measurements!
Example: Assuming a 10000:100 PT ratio, use the settings below:
PQube Configurator Settings:
Setup.ini tags
; ------ Valid values: from 1:1 up to 500000:1
; You can use fractional values such as 1250.5:120
; If your application requires a ratio higher than 10000:1
; please contact factory for additional information
Potential_Transformer_Ratio=10000:100
; ------ Valid values: from 0.95 up to 1.05
L1_E_Voltage_Gain_Calibration_Factor=0.9995
L2_E_Voltage_Gain_Calibration_Factor=1.0251
L3_E_Voltage_Gain_Calibration_Factor=1.0087
N_E_Voltage_Gain_Calibration_Factor=1.0000
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