Abstract: An auxiliary wire, a flat cable and a round cable are provided. Each of the flat cable and the round cable is provided with the auxiliary wire with the loose jacket protective layer.

Abstract: A composite material, in particular for use in a transformer comprising a first and a second grain-oriented electric strip layer and a polymeric layer arranged therebetween is disclosed. The polymeric layer includes a crosslinked acrylate-based copolymer of high molecular weight and has a layer thickness in the range from 3 to 10 ?m.

Abstract: The present invention relates to a method for producing a grain-oriented flat steel product that is intended for the manufacture of parts for electrotechnical applications and has minimised magnetic loss values and optimised magneto-restrictive properties, including the operations providing a flat steel product, laser-treating the flat steel product, wherein, in the course of the laser treatment, linear deformations, which are arranged with a spacing L, are formed into the surface of the flat steel product by means of a laser beam emitted by a laser beam source with a power P. The method according to the invention for producing flat steel products is optimally suited for the manufacture of parts for transformers.

Abstract: The invention relates to a method for producing a grain-oriented electrical steel flat product with minimised magnetic loss values wherein the method comprises the following work steps: a) providing an electrical steel flat product, b) applying a layer of a phosphatic insulation solution for at least one surface of the electrical steel flat product and baking the applied layer. In order that the tensile stresses acting on the surface of an electrical steel flat product are increased further by means of such a method, the invention proposes that, after a first execution of work step b) this work step b) is repeated at least once, so that from the layers of phosphatic insulation solution applied and baked one after another and one on top of the other an insulation coating is obtained.