| 摘要 |
In the case of a signalling mechanism which is arranged in such a manner in a closed housing (6, 30, 32, 34, 36, 38) and in which a first group of live current tracks (11) can be connected to a second group of current tracks (13) by means of a current switch which can be switched over between a coupling position and an isolating position, the current switch is arranged such that it is located inside the housing even in the isolating position. When the current switch is located in this isolating position, two protection screens (24, 25) can be inserted into guides (40, 42) which are installed on both side walls (36, 38) of the housing, for screening with respect to the first and second groups of current tracks. <IMAGE> |
