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 delivering large amounts of electrical energy to motors and other heavy loads.

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, between 0 and 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 flowing to the load to the 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 (between 0 and 1). Typical power factors range from 0.8 to 0.95 for most industrial equipment.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between kW and kVA?
A: kW is real power (what you're billed for), while kVA is apparent power (volts × amps). kW = kVA × power factor.

Q2: Why use three-phase instead of single-phase?
A: Three-phase systems are more efficient for power transmission and can deliver more power without increasing conductor size.

Q3: What's a typical power factor value?
A: Induction motors typically have 0.85 PF, while synchronous motors can achieve 1.0. Power factor correction can improve values.

Q4: How do I measure line-to-line voltage?
A: Use a multimeter between any two phase conductors in a three-phase system.

Q5: Can I use this for DC calculations?
A: No, this formula is specifically for three-phase AC systems. DC power is simply voltage × current.