Transformer Secondary Voltage Calculator
A transformer secondary voltage calculator helps you quickly find the output voltage of a transformer. It saves time and reduces calculation errors for engineers, electricians, and students. Use this guide to understand and calculate transformer secondary voltage with ease.
Secondary Voltage Calculator
How to Use Transformer Secondary Voltage Calculator
Follow these simple steps to use a transformer secondary voltage calculator:
- Enter the primary voltage (Vp): This is the input voltage applied to the transformer.
- Enter the number of primary turns (Np): This value comes from transformer design or datasheet.
- Enter the number of secondary turns (Ns): This defines the output voltage level.
- Click "Calculate": The calculator instantly gives the secondary voltage (Vs).
- Review the result: Ensure values match your expected design or requirement.
- Always double-check units before calculating.
- Use accurate turn ratios for precise results.
The transformer voltage formula is based on the relationship between the turns ratio and the voltage ratio of the primary and secondary windings:
To find the secondary voltage specifically, we rearrange it as:
Where:
- Vs = Secondary Voltage
- Vp = Primary Voltage
- Ns = Secondary Turns
- Np = Primary Turns
Step-by-Step Example
Let's look at a practical example to understand the calculation better:
- Primary Voltage (Vp) = 11000V
- Primary Turns (Np) = 2000
- Secondary Turns (Ns) = 75
Step 1: Use formula
Vs = Vp × (Ns / Np)
Step 2: Substitute values
Vs = 11000 × (75 / 2000)
Step 3: Solve fraction
75 / 2000 = 0.0375
Step 4: Multiply
Vs = 11000 × 0.0375 = 412.5V
Final Answer:
Secondary Voltage = 412.5V
Transformer Secondary Voltage Conversion Chart
This chart shows how different turns ratios affect the output voltage for common input voltages:
| Primary Voltage (Vp) | Turns Ratio (Ns:Np) | Secondary Voltage (Vs) |
|---|---|---|
| 11,000V | 1:26.5 | 415V |
| 11,000V | 1:45.8 | 240V |
| 33,000V | 1:79.5 | 415V |
| 33,000V | 1:3 | 11,000V |
| 11,000V | 1:1 | 11,000V |
| 240V | 45.8:1 | 11,000V |
| 480V | 22.9:1 | 11,000V |
| 415V | 1:1.73 | 240V |
Note: A step-down transformer reduces voltage, while a step-up transformer increases voltage.
FAQs About Transformer Secondary Voltage Calculator
A transformer secondary voltage calculator is a tool that calculates output voltage using the turns ratio and input voltage.
It uses the formula: Vs = Vp × (Ns / Np)
Yes. The calculator works for both step-up and step-down transformers.
Turns ratio directly controls voltage transformation. A higher secondary turn increases output voltage.
Yes, if you enter correct values. It assumes an ideal transformer with no losses.
Use volts (V) for voltage and consistent numerical values for turns.
Yes. In real systems, load and losses can slightly reduce the actual output voltage.
It is used in power systems, electronics design, and electrical installations.