ON-LOAD CHANGER FOR SWITCHES HAVING CONTACT STUDS

摘要

The invention relates to an on-load changer for switches having contact studs, wherein for each switching phase there is provided a pair of permanent main contacts whose switching is carried out in reactive electric duty. In stationary conditions, one of these pairs of permanent main contacts (10.1 and 10.2) is always closed to enable the current to permanently pass therethrough. In order to operate the permanent and movable main contacts belonging to one of the permanent main pairs, there is proposed the mounting on the switching axle of a disk-cam comprising a control cam for each phase to be switched. Each of these control cams engages a roller which operates each of the movable permanent main contacts through some mechanical coupling means.