1. What is Resistance Using Line Losses (3 Phase 3 Wire US)?

Resistance Underground AC is defined as the property of the wire or line that opposes the flow of current through it. This calculator helps determine the resistance based on line losses and current in a 3-phase 3-wire underground AC system.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( R \) — Resistance Underground AC (Ohm)
• \( P_{loss} \) — Line Losses (Watt)
• \( I \) — Current Underground AC (Ampere)

Explanation: The formula calculates the resistance by dividing the total line losses by three times the square of the current flowing through the system.

3. Importance of Resistance Calculation

Details: Accurate resistance calculation is crucial for designing efficient electrical systems, minimizing energy losses, and ensuring proper voltage levels throughout the network.

4. Using the Calculator

Tips: Enter line losses in watts and current in amperes. All values must be valid (positive numbers greater than zero).

5. Frequently Asked Questions (FAQ)

Q1: Why is resistance calculation important in electrical systems?
A: Resistance calculation helps in determining energy losses, optimizing system design, and ensuring efficient power transmission.

Q2: What factors affect line losses?
A: Line losses are affected by resistance, current flow, length of the conductor, and material properties.

Q3: How does current affect resistance calculation?
A: Higher current values result in higher power losses, which in turn affect the calculated resistance value.

Q4: Are there limitations to this formula?
A: This formula assumes balanced three-phase loading and may not account for all real-world variables like temperature variations and skin effect.

Q5: Can this calculator be used for DC systems?
A: No, this specific formula is designed for 3-phase AC systems. DC systems use different calculations for resistance and power loss.