See more about our products for overload protection of e.g. hoists and cranes. To find the right overload protection, you must: 1. Find the lifting capacity (e.g. 20 T), 2. the number of strands (e.g. 4), 3. Divide the lifting capacity by the number of strands (20 T divided by 4 = 5 T), 4. Find the steel wire diameter (e.g. 10 mm)
Mechanical overload protection Mechanical overload protection works via a mechanical switch that is connected to the crane's hoist. Eg. when the load exposes the steel wire to too much stress, it causes a spring to collapse, thus removing the pressure on a button which activates and stops the hoist from operating.
Electrical overload protection They work like mechanical overload protection devices in that a force is constantly measured, e.g. by how much current is drawn by the electric motors, when the load becomes too big the hoist stops.
Overload protection on hoists with chain Electric chain hoists often have a sliding clutch which works a bit like putting a car in neutral. When an overload is detected, the clutch disengages and a mechanical brake takes over and holds the load, after which the hoist motor continues to run.
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