Gas-Insulated Switchgear Assembly Having An Inspection Window For Visually Detecting The Switching Position Of The Switching Contacts

Abstract

The invention relates to a gas-insulated switchgear, particularly a gas-insulated medium-voltage switchgear, according to claim 1 . In order to satisfy additional safety requirements also with position 2 and 3 disconnectors in gas-insulated switchgears, an inspection glass ( 9 ) is inserted/mounted in the housing ( 10 ) such that the positions of the switching contact elements can be seen directly or indirectly via optical means from outside the housing.

1 . A gas-insulated switchgear assembly, in particular a gas-insulated medium-voltage switchgear assembly, having at least one disconnector within the housing of the insulating gas area, characterized in that an inspection window ( 9 ) is introduced/fitted in the housing ( 10 ) such that the positions of the switching contact elements can be seen from outside the housing directly or indirectly via optical means. 
   
   
       2 . The gas-insulated switchgear assembly as claimed in  claim 1 , characterized in that at least the respective movable switching contact element is provided with a colored or topographical marking ( 5 ), which changes its position with respect to a fixed marking or reference structure depending on the switching position. 
   
   
       3 . The gas-insulated switchgear assembly as claimed in  claim 1  or  2 , characterized in that the inspection window ( 9 ) is arranged in the housing ( 10 ) such that, as a result, the hermetic seal of the housing is maintained. 
   
   
       4 . The gas-insulated switchgear assembly as claimed in  claim 3 , characterized in that a pressure overload triggering device is arranged within the housing ( 10 ) and is triggered markedly before the bursting limit of the inspection window ( 9 ). 
   
   
       5 . The gas-insulated switchgear assembly as claimed in one of the preceding claims, characterized in that the optical means comprise at least one mirror, via which the marking or markings can be seen. 
   
   
       6 . The gas-insulated switchgear assembly as claimed in one of the preceding claims, characterized in that, in order to inspect the switching positions in a polyphase arrangement, the position of the inspection window and of the markings is selected in relation to one another in such a way that the latter can be inspected safely. 
   
   
       7 . The gas-insulated switchgear assembly as claimed in one of the preceding  claims 1  to  5 , characterized in that, in order to inspect the switching positions in a polyphase arrangement, one or more inspection windows are provided. 
   
   
       8 . The gas-insulated switchgear assembly as claimed in one of the preceding  claims 1  to  7 , characterized in that illumination means are provided outside the housing which illuminate the markings for inspection thereof.