Isolation switch or grounding switch

The invention relates to a disconnector or grounding switch (1) for connecting three conductors (2) of different phases to respective switching tubes (3), comprising: a rotatable drive shaft (4) comprising a worm (7) and configured for operating the disconnector or grounding switch (1); respective three switching tubes (3) arranged axially movable together between a connected position configured for connecting the three conductors (2) and a disconnected position configured for not connecting the three conductors (2); a partially toothed worm wheel (5) configured for converting a rotation of the worm (7) into an axial movement of the three switching tubes (3) between a connected position and a disconnected position in which the partially toothed worm wheel (5) is disconnected from the worm (7); and reengagement means (6) configured for reengaging the partially toothed worm wheel (5) with the worm (7) in a connected position and a disconnected position. 本发明涉及一种用于将不同相位的三个导体(2)连接至相应的开关管(3)的隔离开关或接地开关(1)，其包括：可旋转驱动轴