1. Wöhner provides online tools and software to help designers and panel builders verify that their electrical control panel designs meet the IEC 61439 standard for low voltage switchgear assemblies. 2. The tools allow users to calculate short circuit withstand capability, current carrying capacity of busbars, and dielectric strength based on design inputs. 3. Adhering to IEC 61439 ensures safety and proper functioning through compliance verified at the design stage rather than through testing later.