Off Load Voltage Calculator
The Off-load voltage calculator is a simple utility which allows the off load voltage of the transformer to be calculated, based on information provided by the transformer manufacturer.
The following manufacturers information is required:
- Nominal RMS output voltage
- Nominal RMS output current
- Regulation
From this the off-load voltage and source impedance of the transformer can be calculated.
The formula used for calculating the off-load voltage is:
In the above, Vol is the off-load voltage, Vnom is the nominal voltage, and Reg% is the declared regulation in percent. The formula used for calculating the source impedance is:
Where Zsrc is the source impedance, Vol is the off-load voltage, Vnom is the nominal voltage, and Inom is the nominal current.
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