3 Phase Power Consumption Calculator kWh

3-Phase Power Formula:

\[ kWh = \frac{\sqrt{3} \times V \times A \times PF \times h}{1000} \]

Volts (V):

Amps (A):

Power Factor:

Hours (h):

Energy Consumption (kWh):

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1. What is a 3-Phase Power Consumption Calculator?

Definition: This calculator estimates the energy consumption in kilowatt-hours (kWh) for a three-phase electrical system.

Purpose: It helps electrical engineers, facility managers, and energy auditors determine power usage in three-phase systems.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ kWh = \frac{\sqrt{3} \times V \times A \times PF \times h}{1000} \]

Where:

$ kWh $ — Energy consumption (kilowatt-hours)
$ V $ — Voltage (volts)
$ A $ — Current (amperes)
$ PF $ — Power factor (dimensionless, 0-1)
$ h $ — Time (hours)

Explanation: The formula accounts for the three-phase power factor (√3 ≈ 1.732) and converts watts to kilowatts (/1000).

3. Importance of Power Consumption Calculation

Details: Accurate kWh calculations help in energy management, cost estimation, and electrical system design.

4. Using the Calculator

Tips: Enter the system voltage, current, power factor (default 0.85), and operating hours. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is √3 used in three-phase calculations?
A: The √3 factor accounts for the phase difference (120°) between the three phases in a balanced system.

Q2: What's a typical power factor value?
A: Most industrial systems have power factors between 0.85-0.95. Motors often operate around 0.8-0.9.

Q3: Does this work for single-phase systems?
A: No, for single-phase use: kWh = (V × A × PF × h) / 1000 (without the √3 factor).

Q4: How accurate is this calculation?
A: It provides theoretical consumption. Actual usage may vary due to load fluctuations and efficiency losses.

Q5: Can I calculate cost from this result?
A: Yes, multiply kWh by your electricity rate ($/kWh) to estimate operating costs.