Das Projekt "Elementare und zusammengesetzte BSCCO-Supraleiter mit geringem Wechselstromverlust fuer Anwendungen in energietechnischen Geraeten" wird vom Umweltbundesamt gefördert und von Forschungszentrum Karlsruhe GmbH in der Helmholtz-Gemeinschaft, Institut für Technische Physik durchgeführt. Objective: New concepts for High Temperature Superconductors (HTS) with low energy losses at AC operation and high transport currents will be developed for the use in energy technique devices to improve efficiency of power transmission. The developed conductors will be tested in demonstrators of power transmission cables, transformers and coils. Central tasks of the project are: material selection and development, conductor design, production technique and physical characterization of the superconductor properties, especially focussing on AC losses and current carrying capability. Realizing true low loss conductors for AC operation will have a tremendous impact on the future large scale use of the HTS technique and the development of the growing market for HTS products. The economic competitiveness of this new environment friendly technique against the conventional method will be improved strongly when low AC loss HTS superconductors become available.