The principle of the conventional arrestor system is the dissipation of energy by deformation of a ductile strip of material, such as mild steel, by sets of rollers over a large area. The kinetic energy is thus converted into strain energy, which is safely released as low-grade heat.
The SIEMAG TECBERG safety arrestor consists of two ore more strips, suspended from the shaft steelwork, which pass through on an arrestor frame mounted roller boxes. In case of an overwinding situation, the conveyance hits the arrestor frame and the roller boxes are forced to run along the strips, stopping the conveyance in a controlled manner. The arrestor system is designed to suit any shaft and can easily be installed in any hoisting system. It guarantees a smooth and safe arresting of cages, skips and counterweights with a constant retardation.