Containment system for internal arc generated gasses

A containment system for internal arc generated gasses comprising:

• at least one compartment for housing electrical components, the at least one compartment having an aperture through a wall thereof, a bus compartment for housing a main bus, the bus compartment including an opening through a wall thereof, an arc chamber in communication with the aperture and the opening, at least one vent flap member associated with the opening so as to normally close the opening, the at least one vent flap member being moveable to an open position to permit gasses to flow through the opening into the arc chamber, and flap structure associated with the aperture, the flap structure including a plurality of interconnected flaps constructed and arranged to move generally simultaneously from an open position, permitting gasses to flow through the aperture into the arc chamber, to a closed position, closing the aperture to prevent gasses from flowing through the aperture and into the at least one compartment, wherein the flap structure includes actuating structure coupled with the plurality of interconnected flaps, wherein the at least one vent flap member, when moved to the open position thereof, being constructed and arranged to engage the actuating structure to move the plurality of interconnected flaps to the closed position thereof.