Choose to calculate by Current (Amps) or Power (kW). Enter your system's parameters (e. Adjust the Safety Factor if needed (default is 25%). Instead, the load is adjusted according to busbar size and system capacity. Diversity factor according to busbar standard IEC 61439-1 and 2 is shown below, Therefore, if a. The busbar sizing calculator determines the required busbar dimensions based on the continuous current rating, short circuit withstand, and thermal limits for switchgear assemblies. The current rating is calculated from the conductor cross-sectional area, material (copper or aluminium), and maximum. Calculate current capacity, voltage drop, and temperature rise for electrical bus bars. What is a Bus Bar? A bus bar is a metallic strip or bar used in electrical. Bus bars are the essential components in the electrical distribution systems (EDB) serving as primary conductors that carry current between 1). Full IEC. The IEC standard for busbar sizing provides formulas to calculate this: Thermal withstand (I²t): Where: Example Calculation: For a 100 mm² copper busbar with 1s fault duration: This means the busbar can withstand a short-circuit current of up to 14. Know More about IEC Standard.