Voltage Tap Calculator

How to Use This Calculator

1. Enter the primary voltage (V₁) of your transformer in kilovolts (kV).
2. Enter the desired secondary voltage (V₂) in kilovolts (kV) that you want to achieve.
3. Click the "Calculate" button to determine the required tap percentage.
4. The calculator will display the tap percentage, which indicates how far the tap should be moved from the neutral point on the transformer winding.

Working Principle

A voltage tap on a transformer winding allows for adjusting the voltage ratio by connecting the load to a different point on the winding. The tap percentage is calculated as the ratio of the desired secondary voltage to the primary voltage, multiplied by 100.

Example

Suppose you have a transformer with a primary voltage of 11 kV and you need a secondary voltage of 440 V. The tap percentage would be calculated as:

(440 V / 11,000 V) × 100% = 4%

This means you would need to select a tap that is 4% from the neutral point on the transformer winding to achieve the desired secondary voltage.

Applications

This calculator is useful for:

• Designing transformer windings with multiple tap positions
• Matching transformer output to load requirements
• Implementing voltage regulation in power distribution systems