Compact secondary substation

摘要

A Compact Secondary Substation (CSS) (200) comprises an enclosure (205) comprising a roof (210) and a floor (220), wherein the roof (210) and the floor (220) are substantially parallel to each other. The enclosure further comprises a first compartment (230) and a second compartment (240), separated by a partition wall (235) and provided between the roof (210) and the floor (220). The first compartment (230) houses a distribution transformer and the second compartment (240) houses a switchgear. The CSS includes a duct (250) attached to an end of the switchgear, wherein the duct (250) comprises a first angular wall (310) forming a first obtuse angle (260) with the roof (210) in clockwise direction, a second angular wall (320) forming a second obtuse angle (270) with the floor (220) in anticlockwise direction and two lateral walls (330) substantially perpendicular to each of the first angular wall (310) and the second angular wall (320), wherein each of the first angular wall (310) and the second angular wall (320) are extending from the switchgear up to the partition wall (235). The CSS further includes an opening (255) provided at the partition wall (235) and between the first angular wall (310) and the second angular wall (320). The duct (250) is configured to receive flue gases from the switchgear during an event of an electrical arc and guide the flue gases into the first compartment (230) through the opening (255).