To obtain a legitimate, high-quality , one should go through official channels. The primary publisher of DIN standards is Beuth Verlag .
Choose a thickness-width combination from the standard table. Example: (a common size for 1000A - 1600A main busbars). din 43671 pdf english
In many cases, the content of DIN 43671 has been subsumed into or harmonized with (Low-voltage switchgear and controlgear assemblies) or IEC 60439 (older). However, these do not contain dedicated busbar dimension tables. For pure busbar dimensions, EN 13601 (Copper and copper alloys – Copper rods, bars, and wires for general electrical purposes) is the current European standard. But EN 13601 is broader and less specific to the classic DIN 43671 sizes. To obtain a legitimate, high-quality , one should