Contact arrangement for vacuum switches

摘要

The pot contacts, which are arranged coaxially opposite one another, in each case contain a closed contact ring (12) which is provided with a chamfer in each case radially inwards and outwards. The contact ring (12) and/or the contact support (4) contain a zone (14) whose conductivity is considerably less than that of the material of the contact support (4). According to the invention, the zone (14) is arranged in such a manner that the wall thickness (b1) of the hollow-cylindrical outer wall of the contact support (4) and/or of the contact ring (12) is greater than the wall thickness (b2) of the inner wall. Using this design, the current components produce a stabilisation of the arc on the contact bearing surface (13). <IMAGE>