When winding a transformer core with resin tape, oval transformer legs can potentially cause a drop in tension. The tension of the tape is extremely important. To make sure the sheets in the transformer do not move even a millimeter during winding, a brake system with GS-19-150-EE push type gas springs are used. Thanks to its 6 in travel distance serving as a back-up, tape tension is kept constant even in the event of interruptions. This ensures that the winding of the transformer core, which can weigh up to several 1.10 tons, is uniform and even.