The electrical distribution kit is electrical equipment dominated by circuit breakers; The electrical distribution unit is the plant ' s supply kit, which pre-empts electrical equipment at low pressure at each circuit (including electrical control, electrical protection, measuring appliances, such as breakers, isolation switches, sensors, etc.), as well as the parent line, carrier conductors, insulations, etc., and is assembled in closed or semi-enclosed metal cabinets, which form part of the circuit branch, which forms a distribution unit. At the time of installation, the compartments of the units (also known as spacing) are grouped along the main lines and form the entire distribution unit.