1. What is a 3-Phase Delta Current Calculator?

Definition: This calculator determines the phase current in a 3-phase delta configuration based on the measured line current.

Purpose: It helps electrical engineers and technicians calculate phase currents in delta-connected 3-phase systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( I_{phase} \) — Phase current (amps)
• \( I_{line} \) — Line current (amps)

Explanation: In a delta configuration, the phase current is the line current divided by the square root of 3 (approximately 1.732).

3. Importance of Phase Current Calculation

Details: Proper current calculation ensures correct sizing of conductors, protection devices, and prevents equipment damage in 3-phase systems.

4. Using the Calculator

Tips: Enter the measured line current in amps. The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between line and phase current?
A: Line current is measured in the supply lines, while phase current flows through each winding or load element.

Q2: Does this formula work for wye configurations?
A: No, in wye configurations, line current equals phase current.

Q3: Why is the square root of 3 used?
A: It comes from the trigonometric relationship between phase and line quantities in balanced 3-phase systems.

Q4: How do I measure line current?
A: Use a clamp meter on any one of the three line conductors.

Q5: Is this calculation valid for unbalanced loads?
A: This formula assumes a balanced load. For unbalanced loads, more complex calculations are needed.