Secure operation mechanism for electrical shutdown device and device equipped with such a mechanism

A secure operation mechanism (10, 10′) for an electrical shutdown device (1, 1′) housed within a cabinet (4) which is closed by a door (5), the shutdown device (1, 1′) being moveable between a disengaged position (0 position) and an engaged position (1 position) by shifting of a control shaft (6, 6′) attached to a principal handle (7) mounted to the door (5) so as to be accessible from outside the cabinet (4) when the door (5) is closed;

• wherein the secure operation mechanism (10,10′) comprises a secondary handle (11, 11′) attached to the control shaft (6, 6′) so as to be accessible from inside the cabinet (4) in order to switch the shutdown device (1, 1′) between the disengaged and the engaged positions (0 and 1 positions) when the door (5) is open, and a locking means is attached to the control shaft (6,6′) and is positioned to be moveable between a locked position and an unlocked position;
• and
• the locking means moves between the locked position to the unlocked position, when the door (5) is open, by manual action of the secondary handle (11, 11′) and the control shaft (6, 6′) a predefined distance (C) along direction (P) and returns from the unlocked position to the locked position automatically through action of a return mechanism (13, 13′) acting on the control shaft (6, 6′).

An electrical shutdown device (1, 1′) housed within a cabinet (4), which is dosed by a door (5), the shutdown device (1, 1′) being moveable between a disengaged position (0 position) and an engaged position (1 position), the shut down device comprising a control shaft (6, 6′) attached to a principal handle (7) mounted on the door (5) so as to be accessible from outside the cabinet (4) when the door (5) is closed;

• wherein the electrical shutdown device (1, 1′) includes a secure operation mechanism (10, 10′) equipped with a secondary handle (11, 11′) attached to the control shaft (6, 6′) so as to be accessible from inside the cabinet (4) for switching the shutdown device (1, 1′) between the disengaged and the engaged positions (0 and 1 positions) when the door (5) is open, and a locking means attached to the control shaft (6, 6′) and positioned to be moveable between a locked position, in which the locking means prevents switching of the shutdown device (1, 1′) via movement the secondary handle (11, 11′) when the door (5) is open, and an unlocked position, in which switching of the shutdown device (1, 1′) is permitted via a pushing movement of the secondary handle (11, 11′), when the door (5) is open, and via a corresponding pushing movement of the principal handle (7), when the door (5) closed.