KVA to Amp Calculator

kVA to Amps Formula:

\[ I (A) = \frac{kVA \times 1000}{V (V)} \]

Current (I):

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1. What is kVA to Amps Conversion?

The kVA to Amps conversion calculates the electric current (in amperes) from apparent power (in kilovolt-amperes) and voltage. This is essential for electrical system design and safety assessments.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ I (A) = \frac{kVA \times 1000}{V (V)} \] (Single Phase)
\[ I (A) = \frac{kVA \times 1000}{V (V) \times \sqrt{3}} \] (Three Phase)

Where:

\( I \) — Current in amperes (A)
\( kVA \) — Apparent power in kilovolt-amperes
\( V \) — Voltage in volts (V)
\( \sqrt{3} \) — Approximately 1.732 (for three-phase systems)

Explanation: The formula converts kVA to VA (by multiplying by 1000) then divides by voltage to get current. Three-phase systems require dividing by √3 to account for phase relationships.

3. Importance of Current Calculation

Details: Accurate current calculation is crucial for selecting proper wire sizes, circuit breakers, and other electrical components to ensure safe and efficient operation.

4. Using the Calculator

Tips: Enter kVA value, voltage, and select single or three phase system. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between kVA and kW?
A: kVA is apparent power (volts × amps), while kW is real power. They differ by the power factor (kW = kVA × PF).

Q2: Why different formulas for single and three phase?
A: Three-phase systems have three current-carrying conductors with 120° phase shifts, requiring the √3 factor.

Q3: What voltage should I use for three phase?
A: Use line-to-line voltage (typically 208V, 400V, 480V etc. depending on your system).

Q4: Does this account for power factor?
A: No, this gives apparent current. For real current, multiply by power factor.

Q5: Can I use this for DC systems?
A: Yes, for DC use the single-phase formula (no phase difference in DC).