Cam selector for earthing switch

The invention relates to an operating modes selector (2) for an earthing switch (1) that includes power contacts (10) and a motor (24) for moving the power contacts. The selector includes a pluralityof positions corresponding respectively to various operating modes of the earthing switch, and includes cams whose positions are defined by the selector position. The selector contains a first cam which pulls a first locking organ (27) designed to mechanically block the motor of the earthing switch when the selector is in a position corresponding to a locked closed mode wherein the earthing switchis closed. 本发明涉及接地开关(1)的操作模式选择器(2)，该接地开关包括电源触点(10)和用于移动电源触点的电机(24)。选择器包括分别对应于接地开关的各种操作模式的多个位置，并且包括其位置由选择器的位置限定的凸轮。选择器包括拉动第锁定机关(27)的第凸轮，第锁定机关(27)涉及成当选择器处于对应于其中接地开关闭合的锁定闭合模式的位置中时机械地阻塞接地开关的电机。