Amps Per kW Calculator

Calculating the current (in amperes) required for a given power output (in kilowatts) is essential in electrical design and analysis. The relationship between power, voltage, and current depends on whether the system is single-phase or three-phase.

Calculation Formula

For single-phase systems, the formula is: \[ \text{Amps} = \frac{\text{kW} \times 1000}{\text{Voltage}} \]

For three-phase systems, the formula is: \[ \text{Amps} = \frac{\text{kW} \times 1000}{\text{Voltage} \times \sqrt{3}} \]

Example Calculation

If you have a 10 kW load on a 230V single-phase system, the current would be: \[ \text{Amps} = \frac{10 \times 1000}{230} \approx 43.48 \text{ amps} \]

If the same load is on a 400V three-phase system, the current would be: \[ \text{Amps} = \frac{10 \times 1000}{400 \times \sqrt{3}} \approx 14.43 \text{ amps} \]

Importance and Usage Scenarios

Understanding the current drawn by electrical loads is vital for selecting appropriate wiring, circuit breakers, and other components in electrical systems to ensure safety and efficiency. This calculator is useful for electricians, engineers, and anyone involved in electrical system design or maintenance.