Each switchgear unit consists of three power compartments: Circuit-Breaker, Busbars and Cables. Each unit is fitted with a low voltage compartment, where all the auxiliary instruments are housed.
Arc-proof switchgear is normally provided with a duct for evacuation of the gases produced by an arc; different types of gas ducts are available.
All the compartments are accessible from the front and maintenance operations can correctly
carried out with the switchgear installed up against a wall.
The compartments are segregated from each other by metallic partitions.