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Kilowatts to Amps Formula:
(Single-phase; multiply denominator by √3 for 3-phase)
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The Kilowatts to Amps formula converts electrical power (in kilowatts) to current (in amperes) using the circuit voltage. The calculation differs between single-phase and three-phase systems.
The calculator uses these formulas:
Single-phase: \[ I = \frac{kW \times 1000}{V} \]
Three-phase: \[ I = \frac{kW \times 1000}{V \times \sqrt{3}} \]
Where:
Explanation: The formula accounts for the relationship between power, voltage, and current, with different considerations for single-phase vs three-phase systems.
Details: Accurate current calculation is essential for proper circuit design, wire sizing, breaker selection, and electrical safety in both residential and industrial applications.
Tips: Enter power in kilowatts, voltage in volts, and select the appropriate phase. All values must be positive numbers.
Q1: Why is there a difference between single-phase and three-phase calculations?
A: Three-phase systems distribute power across three conductors, requiring the √3 factor to account for phase relationships.
Q2: What's the difference between line-to-line and line-to-neutral voltage in three-phase?
A: Line-to-line voltage is √3 times higher than line-to-neutral. The calculator uses line-to-line voltage for three-phase calculations.
Q3: Does power factor affect this calculation?
A: This simple calculation assumes unity power factor (1.0). For reactive loads, additional power factor considerations are needed.
Q4: How accurate is this calculation for motor loads?
A: Motor starting currents can be much higher than running currents. Consult motor specifications for exact requirements.
Q5: Can I use this for DC circuits?
A: Yes, for DC circuits use the single-phase formula (no √3 factor needed).