公开(公告)号：US20220190565A1

公开(公告)日：2022-06-16

申请号：US17503393

申请日：2021-10-18

Applicant: ABB Schweiz AG

Inventor： Tomas Pasalov ,  Adam Ondricek ,  Pavel Vrbka

IPC: H02B13/025 ,  H02B1/56

Abstract: An apparatus for closing a ventilation opening in a housing of a switch gear in the event of a sudden increase in pressure caused by electric arcing. The apparatus includes a frame which is adapted to be coupled to the housing of the switch gear adjacent the opening, a flap pivotally mounted at the frame, the flap being adapted to be moved from an open position in which the flap overlaps the ventilation opening keeping a gap which allows an airflow through the opening, into a closed position, in which the flap fully covers the opening and blocks the air flow, spring elastic means which urge the flap into the open position, and a retaining element which is adapted to mechanically lock the flap in the closed position after pivoting the flap from the open position into the closed position.

公开(公告)号：US11757266B2

公开(公告)日：2023-09-12

申请号：US17503393

申请日：2021-10-18

Applicant: ABB Schweiz AG

Inventor： Tomas Pasalov ,  Adam Ondricek ,  Pavel Vrbka

IPC: H02B1/56 ,  H02B13/025

CPC classification number: H02B13/025 ,  H02B1/565

Abstract: An apparatus for closing a ventilation opening in a housing of a switch gear in the event of a sudden increase in pressure caused by electric arcing. The apparatus includes a frame which is adapted to be coupled to the housing of the switch gear adjacent the opening, a flap pivotally mounted at the frame, the flap being adapted to be moved from an open position in which the flap overlaps the ventilation opening keeping a gap which allows an airflow through the opening, into a closed position, in which the flap fully covers the opening and blocks the air flow, spring elastic means which urge the flap into the open position, and a retaining element which is adapted to mechanically lock the flap in the closed position after pivoting the flap from the open position into the closed position.