DANSK DSF/FPREN 61788-24 PDF

This part of IEC 61788 describes the test method to determine the retained critical current after double bending at room temperature. The test method is intended for use with short and straight Ag118 and/or Ag alloy-sheathed Bi-2223 superconducting wires that have a monolithic structure and the shape of a flat or square tape containing mono- or multicores of oxides. The wires can be laminated with copper alloy, stainless steel or Ni alloy tapes. The test method is intended for use with superconductors that with a critical current less than 300 A and an n-value larger than 5. The test to determine the retained critical current is carried out without an applied magnetic field with the test specimen immersed in a liquid nitrogen open bath.