1. What is 3 Phase Heater Current?

The 3 phase heater current is the electrical current drawn by a three-phase heating element when connected to a three-phase power supply. It's an important parameter for sizing circuit breakers, wires, and other electrical components.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( I \) — Current in amperes (A)
• \( P \) — Power in watts (W)
• \( V \) — Line voltage in volts (V)
• \( \sqrt{3} \) — Constant for three-phase systems (≈1.732)

Explanation: The formula calculates the current drawn by a balanced three-phase load when the power and line voltage are known.

3. Importance of Current Calculation

Details: Accurate current calculation is crucial for proper electrical system design, ensuring safe operation and preventing overload conditions.

4. Using the Calculator

Tips: Enter power in watts and line voltage in volts. Both values must be positive numbers. The calculator will compute the current in amperes.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between line and phase voltage?
A: In three-phase systems, line voltage is between any two phases, while phase voltage is between a phase and neutral.

Q2: Does this formula work for unbalanced loads?
A: No, this formula assumes a balanced three-phase load. Unbalanced loads require more complex calculations.

Q3: What is the power factor in this calculation?
A: For purely resistive loads like heaters, the power factor is 1, so it's not included in the formula.

Q4: Can I use this for motor current calculations?
A: No, motors have inductive characteristics and require power factor and efficiency considerations.

Q5: How do I convert kW to W for this calculator?
A: Multiply kilowatts by 1000 to get watts (1 kW = 1000 W).