1. What is Full Load Current (FLC)?

Full Load Current (FLC) is the current drawn by an electric motor when operating at its rated power, voltage, and frequency. It's crucial for proper motor protection and circuit design.

2. How Does the Calculator Work?

The calculator uses the standard 3-phase motor FLC formula:

Where:

• \( Power \) — Motor power rating in kilowatts (kW)
• \( Voltage \) — Line-to-line voltage in volts (V)
• \( Power\ Factor \) — Ratio of real power to apparent power (0-1)
• \( Efficiency \) — Motor efficiency (0-1)

Explanation: The formula converts kW to watts (×1000), accounts for 3-phase power (√3), and adjusts for power factor and motor efficiency.

3. Importance of FLC Calculation

Details: Knowing FLC is essential for selecting proper wire sizes, circuit breakers, overload protection devices, and motor starters to ensure safe and efficient operation.

4. Using the Calculator

Tips: Enter motor power in kW, line voltage in volts, and typical power factor (0.85) and efficiency (0.90) if unknown. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between FLC and FLA?
A: Full Load Current (FLC) and Full Load Amps (FLA) are essentially the same - both refer to the current drawn at rated load.

Q2: Why do we multiply by 1000 in the formula?
A: We multiply by 1000 to convert kilowatts (kW) to watts (W) for consistent units in the calculation.

Q3: What is a typical power factor for motors?
A: Induction motors typically have power factors between 0.80-0.90 at full load, lower at partial loads.

Q4: How does voltage affect FLC?
A: FLC is inversely proportional to voltage - higher voltage means lower current for the same power.

Q5: Where can I find motor efficiency values?
A: Motor nameplates or manufacturer datasheets provide efficiency. Standard efficiency motors are typically 85-95% efficient.