Generator kVA to Amps Calculator

Current Formula (3-phase):

\[ I = \frac{kVA \times 1000}{V \times \sqrt{3}} \]

Current (amps):

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1. What is a Generator kVA to Amps Calculator?

Definition: This calculator converts generator apparent power (kVA) to current (amps) in three-phase electrical systems.

Purpose: It helps electricians, engineers, and generator users determine the current output based on generator rating and system voltage.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ I = \frac{kVA \times 1000}{V \times \sqrt{3}} \]

Where:

\( I \) — Current (amps)
\( kVA \) — Generator apparent power (kilovolt-amps)
\( V \) — Line-to-line voltage (volts)
\( \sqrt{3} \) — Constant for three-phase systems (≈1.732)

Explanation: The kVA rating is converted to VA (×1000), then divided by the product of voltage and √3 to get the current per phase.

3. Importance of Current Calculation

Details: Proper current calculation ensures proper wire sizing, circuit breaker selection, and prevents generator overload.

4. Using the Calculator

Tips: Enter the generator kVA rating and system line voltage (default 480V). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Is this for single-phase or three-phase?
A: This calculator is specifically for three-phase systems. Single-phase would use I = (kVA × 1000)/V.

Q2: What's a typical generator voltage?
A: Common voltages are 208V, 240V, 480V, or 600V, but always check your generator's nameplate.

Q3: Does this account for power factor?
A: No, kVA is apparent power which already includes power factor considerations.

Q4: How do I find my generator's kVA rating?
A: Check the generator nameplate or manufacturer specifications.

Q5: Why multiply by 1000 in the formula?
A: To convert kVA (kilovolt-amps) to VA (volt-amps) since 1 kVA = 1000 VA.