1. What is Resistance using Line Losses(DC 3-Wire)?

The Resistance using Line Losses(DC 3-Wire) calculation determines the electrical resistance in a DC 3-wire overhead transmission system based on measured line losses and current. This helps in evaluating the efficiency and performance of the transmission line.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The formula calculates the resistance by dividing the total line losses by twice the square of the current, accounting for the distribution in a 3-wire DC system.

3. Importance of Resistance Calculation

Details: Accurate resistance calculation is essential for designing efficient power transmission systems, minimizing energy losses, and ensuring the stability and reliability of electrical networks.

4. Using the Calculator

Tips: Enter line losses in watts and current in amperes. Ensure all values are positive and valid for accurate results.

5. Frequently Asked Questions (FAQ)

Q1: Why is resistance important in power transmission?
A: Resistance causes energy losses in the form of heat, affecting efficiency. Lower resistance means less power loss and better performance.

Q2: How does current affect line losses?
A: Line losses are proportional to the square of the current (P = I²R). Higher current significantly increases losses.

Q3: What factors influence resistance in overhead lines?
A: Material, cross-sectional area, length, and temperature are key factors affecting resistance.

Q4: Why use a 3-wire DC system?
A: A 3-wire DC system provides a balanced load distribution and can supply both high and low voltages, improving efficiency.

Q5: Can this calculator be used for AC systems?
A: No, this formula is specific to DC systems. AC systems involve additional factors like inductance and capacitance.