1. What is Current Per Phase Calculation?

The Current Per Phase calculation determines the current flowing through each phase in a three-phase electrical system. It's essential for designing and analyzing balanced three-phase circuits commonly used in power distribution systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( I_{line} \) — Line current in amperes
• \( I_{phase} \) — Phase current in amperes
• \( \sqrt{3} \) — Approximately 1.732 (constant for three-phase systems)

Explanation: In a balanced three-phase system, the phase current is calculated by dividing the line current by the square root of 3.

3. Importance of Current Per Phase Calculation

Details: Accurate current per phase calculation is crucial for proper sizing of electrical components, circuit protection devices, and conductors in three-phase power systems.

4. Using the Calculator

Tips: Enter the line current value in amperes. The value must be greater than zero. The calculator will automatically compute the phase current.

5. Frequently Asked Questions (FAQ)

Q1: When is this calculation applicable?
A: This calculation applies to balanced three-phase systems with star (wye) configuration where line and phase currents differ.

Q2: What's the difference between line current and phase current?
A: Line current is the current in the supply lines, while phase current is the current through each phase winding or load element.

Q3: Does this formula work for delta configurations?
A: In delta configurations, line current equals phase current multiplied by √3, so the relationship is different.

Q4: What if my system is unbalanced?
A: This calculator assumes a balanced system. For unbalanced systems, more complex calculations are needed for each phase separately.

Q5: Why is √3 used in three-phase calculations?
A: √3 represents the geometrical relationship between phase and line quantities in three-phase systems, derived from trigonometric relationships.