1. What is Resistance Using Line Losses (1-Phase 2-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 in a 1-phase 2-wire underground AC system based on line losses and current.

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 line losses by twice 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.

5. Frequently Asked Questions (FAQ)

Q1: Why is resistance calculation important in electrical systems?
A: Resistance calculation helps in determining energy losses, optimizing system efficiency, and ensuring proper equipment sizing.

Q2: What factors affect resistance in underground cables?
A: Cable material, cross-sectional area, length, temperature, and installation conditions all affect resistance values.

Q3: How does line loss relate to resistance?
A: Line losses are directly proportional to resistance - higher resistance results in greater energy losses as heat.

Q4: Can this formula be used for other electrical systems?
A: This specific formula is designed for 1-phase 2-wire underground AC systems. Other systems may require different formulas.

Q5: What are typical resistance values for underground cables?
A: Resistance values vary based on cable specifications, but typically range from 0.1 to 10 Ohms per kilometer for standard power cables.