Resistance using Load Current (2-Phase 4-Wire OS) Calculator

Resistance using Load Current (2-Phase 4-Wire OS) Formula:

\[ R = \frac{P_{loss}}{4 \times I^2} \]

Resistance Overhead AC (R):

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1. What is Resistance using Load Current (2-Phase 4-Wire OS)?

Resistance using Load Current (2-Phase 4-Wire OS) is defined as the property of the wire or line that opposes the flow of current through it in a 2-phase 4-wire overhead system. It's calculated based on line losses and current flowing through the system.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ R = \frac{P_{loss}}{4 \times I^2} \]

Where:

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

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

3. Importance of Resistance Calculation

Details: Accurate resistance calculation is crucial for determining power losses in transmission lines, designing efficient electrical systems, and optimizing energy transmission in 2-phase 4-wire overhead systems.

4. Using the Calculator

Tips: Enter line losses in watts and current in amperes. All values must be valid positive numbers (line losses > 0, current > 0).

5. Frequently Asked Questions (FAQ)

Q1: Why is the formula divided by 4?
A: The division by 4 accounts for the 2-phase 4-wire configuration, where the total losses are distributed across the system.

Q2: What are typical resistance values for overhead lines?
A: Resistance values vary depending on conductor material, size, and length, but typically range from 0.1 to 1.0 Ohm per kilometer for standard overhead conductors.

Q3: How does temperature affect resistance calculation?
A: Resistance increases with temperature. The formula assumes standard operating temperature; for precise calculations, temperature correction factors may be needed.

Q4: Can this formula be used for DC systems?
A: No, this specific formula is designed for AC systems. DC systems use different calculations as they don't have reactive components.

Q5: What factors contribute to line losses?
A: Line losses are primarily due to conductor resistance, but also include dielectric losses, corona losses, and radiation losses in overhead AC systems.