Professional busbar sizing calculator with current-carrying capacity per IEC 61439, temperature rise analysis, short-circuit withstand (thermal & mechanical), skin/proximity effect derating, voltage drop, bolted joint analysis, and copper vs aluminum cost comparison. Free. Undersized busbars are one of the leading causes of switchgear failures: they overheat, degrade insulation, and can trigger cascading short circuits. The current rating is calculated from the conductor cross-sectional area, material (copper or aluminium), and maximum. RiLine busbar systems for individual switchgear and controlgear up to 2100 A. Complete solutions for AC or DC applications. 3-pole, tool-free mounting, short circuit-resistant up to 65 kA, fully contact hazard-protected and with standard flat copper bars for global use. 60 mm bar centre distance. That “bargain” bare copper busbar has begun oxidizing, and the oxide layer—a poor conductor—has pushed contact resistance through the roof.
[PDF Version]We Look Forward to Working with You