Constant(3-Phase 3-Wire OS) Calculator

Constant Overhead AC Formula:

\[ K = \frac{4 \times (P^2) \times \rho \times (L)^2}{P_{loss} \times (V_m^2)} \]

Power Transmitted (P):

Watt

Resistivity (ρ):

Ω·m

Length of Overhead AC Wire (L):

Meter

Line Losses (P_loss):

Watt

Maximum Voltage Overhead AC (V_m):

Volt

Constant Overhead AC (K):

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1. What is the Constant Overhead AC?

The Constant Overhead AC is defined as the constant of line of an Overhead supply system for 3-phase 3-wire configuration. It represents the relationship between power transmission parameters and system losses.

2. How Does the Calculator Work?

The calculator uses the Constant Overhead AC formula:

\[ K = \frac{4 \times (P^2) \times \rho \times (L)^2}{P_{loss} \times (V_m^2)} \]

Where:

\( K \) — Constant Overhead AC
\( P \) — Power Transmitted (Watt)
\( \rho \) — Resistivity (Ω·m)
\( L \) — Length of Overhead AC Wire (Meter)
\( P_{loss} \) — Line Losses (Watt)
\( V_m \) — Maximum Voltage Overhead AC (Volt)

Explanation: The formula calculates the system constant based on power transmission characteristics and electrical properties of the overhead line.

3. Importance of Constant Calculation

Details: Accurate calculation of the overhead line constant is crucial for system design, loss optimization, and efficient power transmission planning in 3-phase 3-wire overhead systems.

4. Using the Calculator

Tips: Enter all values in appropriate units. Power transmitted and line losses in Watts, resistivity in Ω·m, length in meters, and maximum voltage in Volts. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What does the Constant Overhead AC represent?
A: It represents the system constant that relates power transmission parameters to line losses and voltage characteristics in overhead AC systems.

Q2: When is this calculation most useful?
A: This calculation is essential during the design phase of overhead power transmission systems and for optimizing existing systems to minimize losses.

Q3: What factors affect the Constant value?
A: The constant is affected by power level, conductor material resistivity, line length, system losses, and operating voltage.

Q4: How accurate is this calculation?
A: The calculation provides theoretical values based on ideal conditions. Actual system performance may vary due to environmental factors and non-ideal conditions.

Q5: Can this be used for DC systems?
A: No, this specific formula is designed for 3-phase 3-wire AC overhead systems. DC systems require different calculation methods.