Sealed doors, enclosures, and methods adapted for use with electrical arc-prone components

A sealed enclosure, comprising:

• a case configured to receive an arc-prone electrical component;
• a face frame on the case defining an opening in the case, the face frame having a plurality of sealing surfaces on portions thereof;
• a door configured to cover the opening;
• and
• a plurality of flaps coupled to the door, one flap of the plurality of flaps adjacent to each edge of the door, the plurality of flaps each having a sealing portion positioned relative to one of the sealing surfaces at the peripheral portion, the plurality of flaps configured to be flexible and deformable and configured and capable of operating to flex from a disengaged position when not under pressure, to an engaged position in contact with the sealing surfaces when exposed to arcing pressure inside the case during an arcing event so as to seal between the door and the face frame on all edges of the door.

A method of sealing an enclosure during an arcing event, the method comprising:

• providing a face frame on a case of the enclosure, the enclosure including an arc-prone component;
• providing a door on the case;
• providing a sealing surface on a portion of the door or on an edge portion of the face frame;
• providing a plurality of flaps configured to be flexible and deformable;
• and
• sealing between the door and the face frame on all edges of the door during the arcing event by flexing the plurality of flaps into contact with the sealing surface responsive to arcing pressure buildup in the enclosure due to the arcing event.