Rated Current Calculator

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Rated Current Calculator

The Rated Current Calculator helps determine the maximum current an electrical component, like a wire, fuse, or circuit breaker, can safely handle under specific operating conditions. This is crucial for ensuring electrical safety, preventing overheating, and avoiding equipment damage.

Key Factors:

  • Rated Voltage (V): The maximum voltage the component is designed to operate with.
  • Rated Power (W): The maximum power the component can safely dissipate or handle.
  • Power Factor (PF): A measure of how effectively electrical power is being converted into useful work. For resistive loads (like heaters), it's close to 1. For inductive or capacitive loads (like motors or fluorescent lights), it's less than 1.

The fundamental relationship used here is derived from the power formula: Power (P) = Voltage (V) × Current (I) × Power Factor (PF). By rearranging this formula, we can calculate the current (I): Current (I) = Power (P) / (Voltage (V) × Power Factor (PF)).







function calculateRatedCurrent() { var voltage = parseFloat(document.getElementById("ratedVoltage").value); var power = parseFloat(document.getElementById("ratedPower").value); var pf = parseFloat(document.getElementById("powerFactor").value); var resultDiv = document.getElementById("result"); if (isNaN(voltage) || isNaN(power) || isNaN(pf)) { resultDiv.innerHTML = "Please enter valid numbers for all fields."; return; } if (voltage <= 0 || power <= 0 || pf 1) { resultDiv.innerHTML = "Please enter positive values. Power Factor must be between 0 and 1."; return; } var ratedCurrent = power / (voltage * pf); resultDiv.innerHTML = "Rated Current: " + ratedCurrent.toFixed(2) + " A"; }

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