INTERLOCK MECHANISM FOR AN EARTHING SWITCH OF A GAS INSULATED SUBSTATION

The invention relates to an interlock system (1) to block or free a cogwheel of an actuation mechanism of an earth switch for gas insulated substation, this interlock system (1) comprising a housing (4) enclosing : a swivel lever having an end moveable between a blocking position pressed against the cogwheel, and a free position at a distance from the cogwheel ; a rotating axle movable between a blocking position and a free position, this axle having an inner extremity carrying a cam disc to move the swivel lever, and an outer extremity protruding out of the housing (4) to actuate this axle ; a spring having an extremity secured to the swivel lever and another extremity secured to the housing (4) to press the swivel lever against the cam disk ; a key lock (8, 9) secured to the housing (4) and cooperating with the axle (21) to lock it in its blocking or free position. 本发明涉及种用于气体绝缘变电站的接地开关的互锁机构，能够阻挡或释放用于气体绝缘变电站的接地开关的致动机构的嵌齿轮，该互锁系统(1)包括壳体(4)，该壳体封装：转杆，该转杆具有能够在按压嵌齿轮的阻挡位置和与嵌齿轮间隔开定距离的自由位置之间移动的端部；旋转轴，该旋转轴能够在阻挡位置和自由位置