This IEC 61439 low voltage switchgear has undergone complete routine-verification and type-testing per Parts 1 & 2, including temperature-rise verification, dielectric tests and 100 kA/1 s short-circuit withstand. Busbar systems use 99.9 % pure copper with 10 µm silver plating, achieving <20 µΩ joint resistance. Each functional unit is segregated to Form 4b, providing operator safety during maintenance.