1. What is Transmitted Current in Short Circuit Line?

Transmitted Current in a short transmission line refers to the electrical current that flows from the source to the load, influenced by the line's impedance and applied voltage. It is a crucial parameter in power system analysis and protection design.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( I_t \) — Transmitted Current (Ampere)
• \( V_t \) — Transmitted Voltage (Volt)
• \( Z_0 \) — Characteristic Impedance (Ohm)

Explanation: This formula calculates the current transmitted through a short circuit line based on the voltage and characteristic impedance relationship.

3. Importance of Transmitted Current Calculation

Details: Accurate transmitted current calculation is essential for power system protection, fault analysis, equipment sizing, and ensuring system stability during short circuit conditions.

4. Using the Calculator

Tips: Enter transmitted voltage in volts and characteristic impedance in ohms. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is characteristic impedance in transmission lines?
A: Characteristic impedance is the inherent impedance that determines the relationship between voltage and current waves in a transmission line, often approximated as purely resistive for short lines.

Q2: How does transmitted voltage differ from source voltage?
A: In short transmission lines, transmitted voltage closely matches the source voltage due to minimal voltage drop over the short distance.

Q3: When is this calculation most applicable?
A: This calculation is particularly useful for short circuit analysis, protection relay setting, and fault current calculations in power systems.

Q4: Are there limitations to this formula?
A: This formula assumes ideal conditions and may need adjustments for long transmission lines, complex impedance, or non-linear loads.

Q5: How does this relate to power system protection?
A: Transmitted current calculation helps determine appropriate circuit breaker ratings, relay settings, and ensures proper protection coordination during fault conditions.