EN 61788-3:2006

FOREWORD
INTRODUCTION
1 Scope
2 Normative reference
3 Terms and definitions
4 Principle
5 Requirements
6 Apparatus
7 Specimen preparation
8 Measurement procedure
9 Precision and accuracy of the test method
10 Calculation of results
11 Test report
Annex A (informative) Additional information relating to
        Clauses 1 to 10
Annex B (informative) Magnetic hysteresis of the critical
        current of high-temperature oxide superconductors
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Bibliography

This part of IEC 61788 covers a test method for the determination of the dc critical current of short and straight Ag- and/or Ag alloy-sheathed Bi-2212 and Bi-2223 oxide superconductors that have a monolithic structure and a shape of round wire or flat or square tape containing mono- or multicores of oxides. This method is intended for use with superconductors that have critical currents less than 500 A and n-values larger than 5. The test is carried out with and without an applying external magnetic field. For all tests in a magnetic field, the magnetic field is perpendicular to the length of the specimen. In the test of a tape specimen in a magnetic field, the magnetic field is parallel or perpendicular to the wider tape surface (or one surface if square). The test specimen is immersed either in a liquid helium bath or a liquid nitrogen bath during testing. Deviations from this test method that are allowed for routine tests and other specific restrictions are given in this standard.