Patent ID: 8354904

Claim:
A mechanical override device suitable for an undervoltage coil of a switching unit, said undervoltage coil including a plunger moveable between a first excited position kept duing normal operation when the undervoltage coil is energized and a second non-excited position taken when the undervoltage coil is in an under voltage condition, wherein the mechanical override device comprises: a first portion suitable for urging said plunger in said first excited position when said undervoltage coil is in said undervoltage condition; a second portion suitable for receiving an external movement command; and movement control means for controlling one or more cinematic parameters of said first portion, wherein said first portion is movable, through an unlocking operating movement which is activated upon a releasing external command given by an operator on said second portion suitable for receiving an external movement command, from a locking position in which said first portion is suitable to keep said plunger urged in said first excited position, to an unlocking position in which said first portion does not act on said plunger, said movement control means being configured to render said unlocking operating movement of the first portion independent from the manner in which said releasing external command is given by the operator.