Crane Limit Switches

A crane limit switch, or crane power limit switch, is a safety device designed to prevent the over-travel of a crane hoist. Crane limit switch AFTER. Crane limit switch BEFORE. The limit switch is operated by contact with the crane hook block. When activated, the limit switch interrupts power to the lift motor.A limit switch is an electromechanical device operated by a physical force applied to it by an object. Limit switches are used to detect the presence or absence of an object. These switches were originally used to define the limit of travel of an object, and as a result, they were named Limit SwitchThe hoist limit switch is a safety device that is provided to allow the setting of the hoist travel within a prescribed travel range. The upper limit of hoist travel is achieved through a hook operated type limit switch and the lower limit of hoist travel is achieved through a drum-activated limit switch.