| 摘要 |
<p>The invention concerns an electrical apparatus (20) comprising a housing (20') having a on its rear surface a recess (16) for receiving a mounting rail (1), the dimension (a) of the recess (16) being greater than the dimension (b) of the mounting rail (1), viewed respectively in the vertical axis direction of the apparatus (20), and retaining devices (2', 2'') capable of being inserted in the inner space of the recess (16) and interlocked in their fixing position. At least one of the retaining devices is maintained in its working position elastically projecting into the inner space of the recess (16) towards its inactive position clearing the inner space. The apparatus (20) is provided, in its upper zone and in its lower zone, with clamping devices (31) wherein can be introduced connecting elements of collecting bars (21, 21a, 23) in a plane almost parallel to the mounting rail (1) and at a predefined insertion depth (t). The invention aims at facilitating mounting and dismounting of such an electrical apparatus. Therefor, the dimension (a) of the recess (16) is greater than the dimension (b) of the mounting rail by at least the sum of the insertion depth (t) for the connecting elements of the clamping devices (31) provided at the upper zone and the lower zone, viewed respectively in the direction of the vertical axis of the apparatus.</p> |
