The hoist limit switch controls the upper limit of which crane component?

The hoist limit switch controls the upper limit of which crane component?

• A. The load block
• B. The trolley
• C. The bridge
• D. The hoist motor

Answer: (A)

Hoist limit switches control the vertical travel of the lifting assembly. When the hook and its attached load (the load block) reach the preset highest position, the hoist limit switch stops power to the hoist motor to prevent over-raising. This protects the load rope, hook assembly, and surrounding structure from damage. Horizontal movement of the trolley or bridge uses different limit devices, so the upper limit by the hoist limit switch specifically applies to the load block.

Hoist limit switches control the vertical travel of the lifting assembly. When the hook and its attached load (the load block) reach the preset highest position, the hoist limit switch stops power to the hoist motor to prevent over-raising. This protects the load rope, hook assembly, and surrounding structure from damage. Horizontal movement of the trolley or bridge uses different limit devices, so the upper limit by the hoist limit switch specifically applies to the load block.