Crane limit switches keep bridge, trolley, hook and drum movement within defined operating limits. KBT provides cross-type travel switches, rotary/drum limit switches and position switches with different actuator arrangements. The correct model depends on whether the movement is linear or rotary, the required control stages, contact arrangement, rotation ratio, mounting geometry and site conditions.
First define the motion and the functions required at each limit, such as slowdown and stop. Then compare actuator type, stages, contacts, operating frequency and environmental protection.
Technical specifications and procurement documents commonly use “crane limit switch”, “cross limit switch”, “rotary drum limit switch”, “overhead crane position switch” and “hoist limit switch”. Depending on the region and the monitored function, “rotary limit switch”, “geared limit switch”, “drum limit switch” and “crane travel limit switch” may also appear. These expressions overlap, but they do not make two devices interchangeable without checking actuator geometry, contacts, environmental limits and certification.
Relevant KBT product families on this category page include KSA, NSR1520 and TPR1520. The model code identifies a product family; the exact actuator, contact arrangement, enclosure and certification must be confirmed from the selected version.