GAS REMOVAL DEVICE FOR MEDIUM-VOLTAGE FUNCTIOINAL UNIT AND DISTRIBUTION SUBSTATION COMPRISING SAME

摘要

A modular medium-voltage distribution substation comprises a juxtaposition of functional units (4). To increase the distribution volume of the gases originating in particular from an internal arc, and to enable easy flow to the gas outlet means, the functional units comprise a chimney (9) at the rear and a tunnel (510) underneath the functional group. Gas flow between the tunnel (510) and chimney (9) is free, as is the flow between chimneys (9) and tunnels (510) of adjacent substations. Furthermore, the chimney (9) comprises means (506) for absorbing the energy released by mechanical deformation. The gas flow is thus improved and controlled, and the tightness of the enclosure is maintained. (FIGURE 10A)