1. What is the Voltage Calculation Formula?

The voltage calculation formula \( V = \frac{P}{I \times PF} \) determines the voltage when you know the power (in watts), current (in amperes), and power factor (unitless, between 0 and 1). This is particularly useful in AC circuit analysis and power engineering.

2. How Does the Calculator Work?

The calculator uses the voltage formula:

Where:

• \( V \) — Voltage in volts (V)
• \( P \) — Power in watts (W)
• \( I \) — Current in amperes (A)
• \( PF \) — Power factor (unitless, 0 to 1)

Explanation: The formula shows that voltage is directly proportional to power and inversely proportional to both current and power factor.

3. Importance of Voltage Calculation

Details: Accurate voltage calculation is crucial for designing electrical circuits, selecting appropriate components, and ensuring safe operation of electrical systems.

4. Using the Calculator

Tips: Enter power in watts, current in amperes, and power factor (typically between 0.8 and 1 for most systems). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is power factor?
A: Power factor is the ratio of real power to apparent power in an AC circuit, representing how effectively current is being converted into useful work.

Q2: When should I use this calculation?
A: Use this when designing or analyzing AC circuits where you know the power, current, and power factor but need to determine the voltage.

Q3: What's a typical power factor value?
A: For purely resistive loads, PF = 1. For inductive loads like motors, typical values range from 0.8 to 0.95.

Q4: Can this be used for DC circuits?
A: Yes, for DC circuits you can use PF = 1, simplifying the formula to V = P/I.

Q5: Why is my calculated voltage higher than expected?
A: This could be due to an incorrect power factor value. Lower power factors result in higher calculated voltages for the same power and current.