1. What is the Load Current (2 Phase 4 Wire US) Formula?

The Load Current (2 Phase 4 Wire US) formula calculates the current flowing through an underground AC supply wire in a 2-phase 4-wire US system. It considers the power transmitted, maximum voltage, and phase difference to determine the current.

2. How Does the Calculator Work?

The calculator uses the Load Current formula:

Where:

• \( I \) — Current Underground AC (Ampere)
• \( P \) — Power Transmitted (Watt)
• \( V_m \) — Maximum Voltage Underground AC (Volt)
• \( \Phi \) — Phase Difference (Radian)

Explanation: The formula accounts for the relationship between power, voltage, phase difference, and current in a 2-phase 4-wire US system.

3. Importance of Load Current Calculation

Details: Accurate current calculation is crucial for designing electrical systems, selecting appropriate wire sizes, and ensuring safe and efficient power transmission.

4. Using the Calculator

Tips: Enter power transmitted in watts, maximum voltage in volts, and phase difference in radians. All values must be valid (power > 0, voltage > 0, phase difference ≥ 0).

5. Frequently Asked Questions (FAQ)

Q1: Why is the square root of 2 used in the formula?
A: The square root of 2 factor accounts for the relationship between RMS and peak values in AC systems.

Q2: What is the significance of phase difference in current calculation?
A: Phase difference affects the power factor, which influences the actual current required to transmit a given amount of power.

Q3: When should this formula be used?
A: This formula is specifically designed for 2-phase 4-wire US underground AC systems.

Q4: Are there limitations to this formula?
A: This formula assumes balanced loads and ideal conditions. Real-world factors like impedance and losses may affect actual current values.

Q5: How does this differ from single-phase current calculation?
A: 2-phase systems have different characteristics and require specific formulas that account for the phase relationships in such systems.