| 主权项 |
1. A door for an arc-resistant compartment, the door comprising:
surfaces defining at least one opening through the door, and flap structure comprising:
a flap member coupled to the door and movable between an opened position permitting air to pass through the opening, and a closed position covering the opening,spring structure engaged with the flap member and constructed and arranged to bias the flap member to the closed position,handle structure coupled to the flap member and extending through the door for moving the flap member to the opened position against the bias of the spring structure, andretaining structure constructed and arranged to provide a retaining force on the flap member to retain the flap member in the open position, against the bias of the spring structure, the retaining structure being constructed and arranged such that during an arcing event in the compartment, pressure within the compartment together with the bias of the spring structure overcomes the retaining force to automatically move the flap member to the closed position. |
