Without the use of elastic elements between the castors and the underground the vibrations which arise during the operation of a transformer are induced into the adjacent structures. This structure-borne sound is not only unpleasant but it also damages the structure. Vibrastop transformer bearings cannot avoid the vibration of the trafo but they substantially reduce the transfer to the surrounding. The decoupling effect is based on the greatest difference between the own frequency of the smoothly placed transformer and the excitation frequency which arises from the operation of the transformer.
The stronger the deflection, the smaller the own frequency. However, in order to ensure a long life of the transformer a construction-related maximum of spring deflection should not be exceeded, for that reason a graded product range is available.