Powerpact B Frame Circuit Breakers Page 85 Distribution System

Distribution System PowerPact B-Frame 15 to 125 A Circuit Breakers Distribution System Busbar Information Plates for Mounting on Busbars Determining the spacing between busbar supports (LA9ZX01495 and LA9ZX01485), according to IEC 60439-1. 18 Spacing between busbar supports (mm) 200 300 400 500 600 20 30 40 50 60 70 80 k 12 x 10 and 20 x 10 30 x 10 30 x 5 12 x 5 and 15 x 5, 20 x 5, 25 x 5 Short-circuit strength diagram according to UL845 (LA9ZX01508). 200 300 400 500 600 20 5 10 15 20 25 30 Spacing between busbar supports (mm) k 30 x 5, 10 12, 20 x 5, 12, 20 x 10 Load Resistance of Busbar Assemblies in IEC Applications For an Ambient Temperature of 35C and a Busbar Temperature of 65C Cross Section mm (in.) 12 x 5 (0.47 x 0.20) 15 x 5 (0.59 x 0.20) 20 x 5 (0.79 x 0.20) 25 x 5 (0.98 x 0.20) 30 x 5 (1.18 x 0.20) 12 x 10 (0.47 x 0.39) 20 x 10 (0.79 x 0.39) 30 x 10 (1.18 x 0.39) Permissible current A 200 250 320 400 450 360 520 630 In the event of changes in climatic conditions, the following curve indicates the correction factor K2 to be applied. 0611CT1603 85 18. Depending on the short-circuit current.

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