1. What is Three Phase Resistance?

Three phase resistance is a measure of opposition to current flow in a three-phase electrical system. It's calculated using the voltage and power in the system and is crucial for designing and analyzing electrical circuits.

2. How Does the Calculator Work?

The calculator uses the three phase resistance formula:

Where:

• \( R \) — Resistance in ohms (Ω)
• \( V \) — Voltage in volts (V)
• \( P \) — Power in watts (W)

Explanation: The resistance is directly proportional to the square of the voltage and inversely proportional to the power.

3. Importance of Resistance Calculation

Details: Calculating resistance is essential for proper circuit design, power distribution planning, and ensuring electrical safety in three-phase systems.

4. Using the Calculator

Tips: Enter the voltage in volts and power in watts. Both values must be positive numbers. The calculator will compute the resistance in ohms.

5. Frequently Asked Questions (FAQ)

Q1: Is this formula valid for both balanced and unbalanced systems?
A: This formula is specifically for balanced three-phase systems. For unbalanced systems, more complex calculations are needed.

Q2: What are typical resistance values in three-phase systems?
A: Resistance values vary widely depending on the application, from milliohms in power distribution to kiloohms in some control circuits.

Q3: Does temperature affect the resistance calculation?
A: Yes, resistance changes with temperature, but this calculator provides the resistance at the given operating conditions.

Q4: Can I use this for single-phase systems?
A: While the formula is similar, single-phase calculations typically use different power factors and configurations.

Q5: How accurate is this calculation?
A: The calculation is mathematically precise, but actual system resistance may vary due to factors like wire quality and connections.