1. What is Three Phase Power?

Three-phase power is a common method of alternating current electric power generation, transmission, and distribution. It is more efficient than single-phase power for large industrial and commercial applications.

2. How Does the Calculator Work?

The calculator uses the three-phase power formula:

Where:

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

Explanation: The formula calculates real power (kW) in a three-phase system accounting for voltage, current, and power factor.

3. Importance of Power Factor

Details: Power factor represents the ratio of real power to apparent power. A higher power factor (closer to 1) indicates more efficient power usage.

4. Using the Calculator

Tips: Enter line-to-line voltage in volts, current in amperes, and power factor (typically between 0.8 and 1.0). All values must be valid (voltage > 0, current > 0, 0 ≤ PF ≤ 1).

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between kW and kVA?
A: kW is real power (what performs work), while kVA is apparent power (the vector sum of real and reactive power).

Q2: What is a typical power factor value?
A: Industrial facilities typically aim for 0.95 or higher. Motors might have 0.8-0.9 PF when loaded.

Q3: How does voltage affect power calculation?
A: Higher voltage at the same current delivers more power. The relationship is directly proportional.

Q4: Why use three-phase instead of single-phase?
A: Three-phase systems are more efficient for power transmission and can deliver more power with less conductor material.

Q5: Can this formula be used for DC systems?
A: No, DC power is simply voltage × current. The √3 factor and power factor only apply to AC systems.