Formula Used:
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This calculation determines the power transmitted through a single-phase, two-wire underground AC system based on the cross-sectional area of the wire and other electrical parameters. It's essential for designing efficient power distribution systems.
The calculator uses the formula:
Where:
Explanation: The formula calculates the maximum power that can be transmitted through an underground AC cable while accounting for line losses, material properties, and system characteristics.
Details: Accurate power transmission calculation is crucial for designing efficient electrical distribution systems, minimizing energy losses, ensuring proper cable sizing, and maintaining system reliability.
Tips: Enter all values in appropriate units (area in m², voltage in V, losses in W, phase in radians, resistivity in Ω·m, length in m). All values must be positive numbers.
Q1: Why is cross-sectional area important in power transmission?
A: Larger cross-sectional area reduces resistance, which decreases power losses and allows for higher power transmission capacity.
Q2: How does phase difference affect power transmission?
A: Phase difference (power factor) affects the real power component. A lower power factor results in higher losses for the same apparent power.
Q3: What factors influence line losses?
A: Line losses depend on current squared times resistance (I²R), which is affected by conductor material, cross-section, length, and operating temperature.
Q4: Why use underground cables instead of overhead lines?
A: Underground cables offer better aesthetics, reduced vulnerability to weather, lower maintenance, but typically higher installation costs.
Q5: How does resistivity affect power transmission?
A: Materials with lower resistivity (like copper vs aluminum) allow for more efficient power transmission with lower losses for the same conductor size.