Patent ID: 8664552

Claim:
An interlockable lock-out handle system for an electrical switching device comprising: a lock-out rim configured to be disposed over an operating shaft of the switching device and fastened to at least one of a switch housing and a front plate; and a lock-out handle configured to be fastened by a clamping device in rotational engagement on the operating shaft, the lock-out handle including: a rotary handle having a grippable lateral surface, and a lock-out collar, the lock-out collar being vertically displaceable relative to the rotary handle in a direction of a longitudinal axis of the operating shaft into a CLOSED position and an OPEN position, and the lock-out collar being engaged with the lock-out rim so as to prevent twisting movement of the lock-out collar relative to the lock-out rim when the lock-out collar is in the CLOSED position, wherein the lock-out rim is configured to be vertically displaceable only when the electrical switching device is in an OFF position.