Amps to kW Three Phase

Three Phase Power Formula:

\[ P_{kW} = \frac{V \times I \times PF \times \sqrt{3}}{1000} \]

Power (P_kW): kW

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1. What is Three Phase Amps to kW Calculator?

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

Purpose: It helps electricians, engineers, and technicians determine power consumption in three-phase circuits.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ P_{kW} = \frac{V \times I \times PF \times \sqrt{3}}{1000} \]

Where:

\( P_{kW} \) — Power in kilowatts
\( V \) — Line-to-line voltage (volts)
\( I \) — Current (amps)
\( PF \) — Power factor (unitless, 0-1)
\( \sqrt{3} \) — Constant for three-phase systems (≈1.732)

Explanation: The formula accounts for all three phases in the system and converts watts to kilowatts.

3. Importance of Three Phase Power Calculation

Details: Accurate power calculation is essential for proper equipment sizing, energy management, and electrical system design.

4. Using the Calculator

Tips: Enter the line-to-line voltage in volts, current in amps, and power factor (default 0.8). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between line and phase voltage?
A: Line voltage is between any two phases, while phase voltage is between any phase and neutral. Multiply phase voltage by √3 to get line voltage.

Q2: What's a typical power factor value?
A: For motors, 0.8-0.9 is common. Resistive loads have PF=1, while inductive loads have lower PF.

Q3: Can I use this for single-phase systems?
A: No, use P(kW) = V × I × PF / 1000 for single-phase systems (without the √3 factor).

Q4: Why is the √3 factor used?
A: It accounts for the 120° phase difference between the three phases in a balanced system.

Q5: How do I measure current in a three-phase system?
A: Use a clamp meter on one conductor (for balanced loads) or measure all three phases and average them.