| 摘要 |
<p>The manually operated contact unit has a cover plate over the contact elements, parallel to and insulated from the mounting plate. It has holes for the contacts. The cover plate (7) can slide or rotate in a guiding unit, in which it can be locked in at least two positions. Contact elements (29a, 30a, 30b ...) form on the mounting plate (5) at least two groups (a, b, c). Holes (26) in the cover and contact elements are so arranged, that a contact element group is allocated to each cover position, and only this group is accessible, while the others are covered.</p> |
