Physical contact protection device for plug-in switch frame has sliding protection plate and lever operating mechanism

摘要

The invention relates to a protective unit (4) to prevent contact with conductive contacts (3) in a withdrawable rack (1) of a switching device. Said unit comprises at least one displaceable protective plate (6) and a lever arrangement (9, 12 and 23) for operating the protective plate (6). Said lever arrangement has two levers (9 and 12) that are interconnected in an articulated manner, of which a first lever (9) can be operated by means of the switching device and the second lever (12) is coupled to the mobile protective plate (6). To configure the protective unit (4) in such a way that it is not necessary to slide the lever arrangement out of the displacement path of the switching device using the force of the inserted switching device, the linking joint (11) of the two levers (9 and 12) acts simultaneously as the pivot bearing of the first lever (9) and the first lever (9) can be pivoted out of the displacement path of the switching device into an end position by means of a slide block (33) that runs in a graded manner in the pivoting direction of the first lever.