Manufacturing and Test of a 100 kVA HTS Transformer

  1. Dr. K. Grassie3,
  2. Prof. Dr. E. Teuckhoff4,
  3. Prof. Dr. G. Wegner5,
  4. Prof. Dr. J. Hausselt6 and
  5. Prof. Dr. H. Hanselka7
  1. Peter Kummeth1,
  2. Reinhard Schlosser2,
  3. Cord Albrecht1 and
  4. Heinz-Werner Neumüller1

Published Online: 27 APR 2006

DOI: 10.1002/3527607420.ch23

Functional Materials, Volume 13

Functional Materials, Volume 13

How to Cite

Kummeth, P., Schlosser, R., Albrecht, C. and Neumüller, H.-W. (2000) Manufacturing and Test of a 100 kVA HTS Transformer, in Functional Materials, Volume 13 (eds K. Grassie, E. Teuckhoff, G. Wegner, J. Hausselt and H. Hanselka), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527607420.ch23

Editor Information

  1. 3

    Philips Forschungslaboratorium, Postfach 500145, 52085 Aachen, Germany

  2. 4

    Siemens AG, Postfach 3240, 91050 Erlangen, Germany

  3. 5

    Max-Planck-Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany

  4. 6

    Forschungszentrum Karlsruhe, Postfach 3640, 76201 Karlsruhe, Germany

  5. 7

    Institut für Mechanik, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39160 Magdeburg, Germany

Author Information

  1. 1

    Siemens AG, Corporate Technology, P.O. Box 3220, D-91050 Erlangen, Germany

  2. 2

    Siemens AG, Power Transmission and Distribution, D-90027 Nuremberg, Germany

Publication History

  1. Published Online: 27 APR 2006
  2. Published Print: 27 JUN 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527302543

Online ISBN: 9783527607426



  • functional materials;
  • high temperature superconducting (HTS) transformer;
  • manufacturing;
  • test


The main advantages of high temperature superconducting (HTS) transformers are reduced size, weight and a better efficiency compared to conventional transformers. High critical current densities and low ac losses of HTS tape conductors are reasons therefore. As in HTS transformers nonflammable liquid nitrogen can be used as coolant, the potential fire and environmental hazards, which are present in conventional transformers, are drastically reduced. We have designed, manufactured and tested a 100 kVA HTS power transformer as a functional model operated at 77 K. Iron core and the HTS windings were mounted inside of G-FRP cryostat and cooled by liquid nitrogen. The nominal primary current of the transformer is 18 A (5.6 kV) and the secondary nominal current is 92 A (1.1 kV). Untwisted silver sheathed 2223 BPSCCO tapes with 55 filaments were used. While the primary winding (high-voltage) is made of a stack of 30 pancake coils which are connected in series, the two secondary windings (low-voltage) are solenoid coils with five tape conductors wound in parallel and transposed in situ. Primary and secondary windings are arranged concentrically and the secondary windings are connected in series. We performed repeatedly no-load tests, short-circuit tests and load tests which have proved the rated capacity of the transformer. The loss measurements resulted in HTS winding losses of 20.6 W and iron losses of 403 W.