Transformer Impedance Calculator

Formula

The formula to calculate the Transformer Impedance Percentage (I) is:

\[ I = \left( \frac{\text{SCV}}{\text{RV}} \right) \times 100 \]

Where:

\( I \) is the Transformer Impedance Percentage
\( \text{SCV} \) is the Short Circuit Voltage (Volts)
\( \text{RV} \) is the Rated Voltage (Volts)

Transformer Impedance Definition

Transformer impedance percentage is defined as the ratio of the injected voltage to the rated voltage. The rated voltage can be the secondary short condition. It is an important parameter in transformer design and operation, affecting voltage regulation and fault current levels.

Example Calculation

Let's consider an example:

Short Circuit Voltage (SCV): 500 Volts
Rated Voltage (RV): 10000 Volts

Using the formula to calculate the Transformer Impedance Percentage:

\[ I = \left( \frac{500}{10000} \right) \times 100 = 5 \, \% \]

This demonstrates that with a short circuit voltage of 500 Volts and a rated voltage of 10000 Volts, the transformer impedance percentage would be 5%.