1. What is Single Phase Power?

Single phase power is the distribution of alternating current electric power using a system where all voltages vary in unison. It's commonly used for residential and light commercial applications.

2. How Does the Calculator Work?

The calculator uses the single phase power formula:

Where:

• \( P \) — Real power (Watts)
• \( V \) — Voltage (Volts)
• \( I \) — Current (Amperes)
• \( \cos \phi \) — Power factor (dimensionless, 0 to 1)

Explanation: The formula calculates the real power in an AC circuit, accounting for the phase difference between voltage and current.

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 voltage in volts, current in amperes, and power factor (between 0 and 1). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is typical power factor for residential loads?
A: Residential loads typically have power factors between 0.95 and 1.0 for modern equipment.

Q2: How does power factor affect my electricity bill?
A: Some utilities charge penalties for low power factor as it indicates inefficient power usage.

Q3: What causes low power factor?
A: Inductive loads like motors and transformers cause current to lag voltage, reducing power factor.

Q4: How can I improve power factor?
A: Power factor correction capacitors can be added to counteract inductive loads.

Q5: What's the difference between real and apparent power?
A: Real power (Watts) does actual work, while apparent power (VA) is the product of voltage and current.