Isolator with contact knife and locking system using the passing of a dead point

摘要

The circuit isolation mechanism has a fixed contact (1) and a moving contact (2) sliding along a shaft (3) rotating around an axis (4) and controlled by a shaft (5). The control shaft is separate from the rotation axis. There is a lever (6) connected to the control shaft and connected to a rod (7). The angle defined by the lever and rod increase continuously during shaft rotation closure. There is a dead point beyond which the mechanism is blocked in a stable position.