1. What is the Transformer Current Equation?

The transformer current equation relates the primary and secondary currents to the primary and secondary voltages in an ideal transformer. It's based on the principle of conservation of energy in transformers.

2. How Does the Calculator Work?

The calculator uses the transformer current equation:

Where:

• \( I_{primary} \) — Primary current (amps)
• \( V_{primary} \) — Primary voltage (volts)
• \( V_{secondary} \) — Secondary voltage (volts)
• \( I_{secondary} \) — Secondary current (amps)

Explanation: The equation shows that current is inversely proportional to voltage in a transformer - when voltage steps down, current steps up, and vice versa.

3. Importance of Current Calculation

Details: Accurate current calculation is crucial for selecting proper wire sizes, circuit protection, and ensuring the transformer can handle the load without overheating.

4. Using the Calculator

Tips: Enter primary current in amps, primary and secondary voltages in volts. All values must be positive numbers. Common voltage pairs are 220/110 or 110/220.

5. Frequently Asked Questions (FAQ)

Q1: Does this work for step-up transformers?
A: Yes, the equation works for both step-up and step-down transformers.

Q2: Is this calculation accurate for real transformers?
A: This is for ideal transformers. Real transformers have small losses (2-5%) due to core losses and winding resistance.

Q3: What about three-phase transformers?
A: For balanced three-phase systems, the same equation applies using line-to-line voltages.

Q4: How does frequency affect this?
A: Frequency doesn't appear in this basic current equation, though it does affect transformer design.

Q5: Can I use this for auto-transformers?
A: Yes, the same current relationship applies to auto-transformers.