1. What is Transformer Current Ratio?

The transformer current ratio describes the relationship between primary and secondary currents in a transformer. It is inversely proportional to the turns ratio, meaning more turns on the secondary side results in lower current.

2. How Does the Calculator Work?

The calculator uses the transformer current equation:

Where:

• \( I_{secondary} \) — Secondary current (amps)
• \( I_{primary} \) — Primary current (amps)
• \( N_{primary} \) — Number of primary turns
• \( N_{secondary} \) — Number of secondary turns

Explanation: The current in the secondary winding is inversely proportional to the turns ratio between primary and secondary windings.

3. Importance of Current Calculation

Details: Accurate current calculation is crucial for transformer design, circuit protection, and ensuring proper load matching in electrical systems.

4. Using the Calculator

Tips: Enter primary current in amps, number of turns for both primary and secondary. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Is this equation valid for all transformers?
A: This applies to ideal transformers. Real transformers have additional factors like losses and efficiency to consider.

Q2: What if I know the voltage ratio instead?
A: For ideal transformers, current ratio is inverse of voltage ratio (I_s/I_p = V_p/V_s).

Q3: Does this account for transformer efficiency?
A: No, this calculates ideal current. Actual current may differ due to core losses, copper losses, etc.

Q4: Can I use this for step-up transformers?
A: Yes, the equation works for both step-up and step-down transformers.

Q5: What about three-phase transformers?
A: The same principle applies per phase, but additional considerations like connection type (delta/wye) are needed.