Transformer voltage regulation refers to its ability to maintain a constant output regardless of variations in the input voltage or load conditions. It determines how well a transformer can regulate the voltage at its secondary terminals.
This tool calculates both the Step up and Step down voltage regulation
Enter
- VNo-load
- VFull-load
Formula
Step Down Voltage Regulation represents the change in terminal voltage when a load current at any power factor is applied, expressed as a fraction of the no-load terminal voltage.
VRSD = (VNo-load – VFull-load)/VNo-load
Step up voltage regulation represents the ratio of the change in the terminal voltage when a load at a given power factor is removed, and the load voltage.
VRSU = (VNo-load – VFull-load)/VFull-load
Example Calculation
Consider a transformer with a no-load voltage of 120 volts and a full-load voltage of 110 volts.
Using the calculator VRSD = 8.33% and VRSU = 9.09%
Background
Transformer voltage regulation is the measure of the change in voltage from no-load to full-load conditions, expressed as a ratio or percentage of the
- full-load voltage
- no load voltage
A lower percentage indicates better voltage regulation and a more stable output voltage. The concept of ideal transformer voltage regulation refers to the scenario where there is no change in voltage from no-load to full-load conditions. In an ideal transformer, the voltage regulation would be zero.
Voltage regulation is crucial in transformers as it ensures a stable and reliable supply of electricity. It allows for secondary devices to receive the required voltage consistently, preventing damage or malfunction due to overvoltage or undervoltage.
References
[1] Voltage Regulation and Efficiency of Transformers