1. What is Full Load Current?

Full Load Current (FLC) is the maximum current drawn by an electrical device or motor when operating at its rated capacity. It's a critical parameter for proper circuit protection and equipment sizing.

2. How Does the Calculator Work?

The calculator uses the Full Load Current formula:

Where:

• \( P \) — Power in watts (W)
• \( V \) — Voltage in volts (V)
• \( Eff \) — Efficiency (0-1)
• \( PF \) — Power Factor (0-1)

Explanation: The formula calculates the current required to deliver the specified power, accounting for efficiency losses and power factor in AC circuits.

3. Importance of Full Load Current Calculation

Details: Accurate FLC calculation is essential for proper circuit breaker sizing, wire gauge selection, motor protection, and ensuring electrical system safety and efficiency.

4. Using the Calculator

Tips: Enter power in watts, voltage in volts, efficiency as a decimal (0-1), and power factor as a decimal (0-1). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between full load current and starting current?
A: Starting current (inrush current) is typically 5-7 times higher than full load current and lasts only for a short duration during motor startup.

Q2: How does power factor affect full load current?
A: Lower power factor increases the current required to deliver the same amount of real power, resulting in higher FLC values.

Q3: What are typical efficiency values for electric motors?
A: Motor efficiency typically ranges from 0.7 to 0.95, with higher efficiency in larger, modern motors.

Q4: Why is full load current important for circuit protection?
A: Circuit breakers and fuses must be sized to handle the full load current while providing protection against overloads and short circuits.

Q5: How does voltage variation affect full load current?
A: For constant power loads, lower voltage results in higher current, while higher voltage results in lower current.