| 摘要 |
The invention relates to installation switching device (10) having an insulating-material housing (11) and an arc-quenching unit (12), comprising an arc-quenching sheet stack and a prechamber delimited by at least one prechamber plate (14). The insulating material housing (11) carries a retaining pin (15) in the prechamber area, the prechamber plate (14) is provided with a retaining opening (16), the retaining pin (15) engages in the retaining opening (16), and the prechamber plate (14) is thereby held on the inner wall (11) of the housing. |
