Watts To Amps 3 Phase Calculator

Three Phase Power Formula:

\[ I = \frac{W}{V \times \sqrt{3} \times PF} \]

Current (I):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the Three Phase Power Formula?

The three phase power formula calculates electrical current (amps) from power (watts) in a three phase AC system. It accounts for the phase relationship between voltage and current through the power factor.

2. How Does the Calculator Work?

The calculator uses the three phase power formula:

\[ I = \frac{W}{V \times \sqrt{3} \times PF} \]

Where:

\( I \) — Current in amperes (amps)
\( W \) — Power in watts
\( V \) — Voltage in volts
\( PF \) — Power factor (dimensionless, 0 to 1)
\( \sqrt{3} \) — Approximately 1.732 (dimensionless)

Explanation: The formula accounts for the three-phase system configuration and the phase difference between voltage and current through the power factor.

3. Importance of Current Calculation

Details: Accurate current calculation is crucial for proper electrical system design, circuit breaker sizing, wire gauge selection, and ensuring safe operation of electrical equipment.

4. Using the Calculator

Tips: Enter power in watts, voltage in volts, and power factor (between 0 and 1). All values must be valid (watts > 0, volts > 0, 0 < PF ≤ 1).

5. Frequently Asked Questions (FAQ)

Q1: What is power factor and why is it important?
A: Power factor represents the ratio of real power to apparent power. It indicates how effectively electrical power is being used. A lower power factor means more current is required to deliver the same amount of real power.

Q2: What is the typical range for power factor?
A: Power factor typically ranges from 0 to 1. Industrial facilities often have power factors between 0.7-0.95. A power factor of 1 indicates perfect efficiency.

Q3: When should I use this three phase calculation?
A: Use this calculation for three-phase AC electrical systems commonly found in industrial settings, commercial buildings, and large motor applications.

Q4: What is the significance of √3 in the formula?
A: The √3 factor accounts for the phase relationship in a balanced three-phase system where the voltage between phases is √3 times the phase-to-neutral voltage.

Q5: Can this calculator be used for single-phase systems?
A: No, this calculator is specifically for three-phase systems. For single-phase systems, use the formula: I = W / (V × PF).