1. What is Transformer Current Calculation?

The transformer current calculation determines the amperage flowing through a transformer based on its kVA rating and voltage. This is essential for proper transformer sizing and circuit protection.

2. How Does the Calculator Work?

The calculator uses the transformer current formula:

Where:

• \( kVA \) — Transformer apparent power rating
• \( Volts \) — Operating voltage

Explanation: The formula converts kVA to VA (by multiplying by 1000) then divides by voltage to get current in amperes.

3. Importance of Current Calculation

Details: Accurate current calculation is crucial for selecting proper wire sizes, circuit breakers, and ensuring the transformer operates within its rated capacity.

4. Using the Calculator

Tips: Enter kVA rating and operating voltage. Both values must be positive numbers. The calculator will compute the current in amperes.

5. Frequently Asked Questions (FAQ)

Q1: Is this formula for single-phase or three-phase?
A: This is the basic formula for single-phase transformers. Three-phase calculations require an additional factor.

Q2: What's the difference between kVA and kW?
A: kVA is apparent power (volts × amps), while kW is real power (volts × amps × power factor).

Q3: Why multiply kVA by 1000?
A: To convert kilovolt-amps (kVA) to volt-amps (VA) before dividing by voltage.

Q4: Can I use this for DC current?
A: No, this is specifically for AC transformer calculations.

Q5: What if I know the current and need to find kVA?
A: Rearrange the formula: kVA = (Amps × Volts) / 1000