Gas insulated switching device for use at power distribution stations

摘要

1. Gas-insulated switchgear for use in mains distribution stations. 2.1 Gas-insulated switchgears are particularly suitable for use in areas where the conditions are confined. The reduction in size of the gas tank with the load interruptor switches located therein leads, however, to a number of problems during assembly. The object thus exists of developing a gas-insulated switchgear which eases the installation of the individual parts and reduces the assembly cost. 2.2 The solution provides that the contacts (4) of the busbar (2) for one phase of a plurality of load interruptor switches are in each case mounted on a transverse support (3) connected to the busbar (2), that each transverse support (3) rests on a retained (6, 19) support (5), that extinguishing chambers (7) for the individual phases are in each case connected directly to busbars (2), and that each busbar (2) is constructed with three transverse supports (3), three contacts (4), three supports (5) and two retaining devices (6) to form a prefabricated assembly which can be inserted into the gas tank (1), which is initially open on the rear side (17), and that the three earthing contacts (9) belonging to the earthing device are mounted on each switch shaft (8). 2.3 Gas-insulated switchgears are preferably suitable for mains distribution stations which have confined spatial conditions. IMAGE