1. What is the Transformer Output Voltage Formula?

The transformer output voltage formula calculates the secondary voltage based on the primary voltage and turns ratio. For a 400V primary, the output voltage is directly proportional to the turns ratio.

2. How Does the Calculator Work?

The calculator uses the transformer equation:

Where:

• \( V_{out} \) — Output voltage (volts)
• 400 — Primary voltage (volts)
• \( ratio \) — Turns ratio (N_secondary/N_primary)

Explanation: The output voltage is determined by multiplying the primary voltage (400V) by the turns ratio of the transformer.

3. Importance of Transformer Calculations

Details: Accurate transformer calculations are essential for proper electrical system design, ensuring correct voltage transformation and preventing equipment damage.

4. Using the Calculator

Tips: Enter the turns ratio (secondary turns divided by primary turns). The value must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical turns ratio for step-down transformers?
A: For 400V to 230V conversion, a typical ratio would be 0.575 (230/400).

Q2: Can this calculator be used for step-up transformers?
A: Yes, simply use a ratio greater than 1 for step-up applications.

Q3: How does load affect the output voltage?
A: Actual output voltage may vary slightly under load due to transformer regulation.

Q4: What about three-phase transformers?
A: This calculator is for single-phase. Three-phase calculations require additional considerations.

Q5: Is 400V a common primary voltage?
A: Yes, 400V is common in many industrial and European power systems.