A unit of electrical distribution devices conte-ned in a metal enclosure.

摘要

Each section of a three-phase metal-enclosed switchgear unit is provided with main through horizontal bus and generally J-shaped vertical section bus. The J-shaped vertically extending risers are connected to the horizontal main through bus, and feed circuit breakers or other branch bus circuit controlling devices mounted in the switchgear unit. A small section of the J-shaped bus is turned around and butt welded to the back of the J-shaped vertical section bus, where a connection to the main through horizontal bus is desired.