ABB 315/400A 4P 166mm MANUAL CHANGE – OVER SWITCHES

An “ABB 4P 166mm Manual Change-Over Switch” refers to a switch manufactured by ABB that allows you to manually switch between two different power sources, with “4P” indicating it has four poles (for connecting four wires), and “166mm” likely referring to the size of the switch’s mounting shaft; essentially, it’s a manually operated device used to transfer power from one source to another when needed, like switching between the main power grid and a backup generator, without causing disruptions in the power supply.