NDLI: Testing of a prototype high temperature superconducting current lead

Content Provider	IEEE Xplore Digital Library
Author	Wu, J.L.
Copyright Year	2002
Abstract	A prototype helium vapor-cooled current lead employing a ceramic high temperature superconductor was designed and tested. The lead which has a nominal current rating of 1 kA consists of copper and a ceramic superconductor sections and was designed for operation in 300 K/4.2 K temperature range. A single monolithic bismuth-based superconductor (BSCCO-2212) was used in the superconductor section. Extensive testing of the current lead was carried out to determine its performance such as steady-state boil-off rates at various operating currents, transient characteristics of the lead under zero-flow condition, and the effects of repetitive current cycling. At 1000 A operating current, the lead was found to require a steady-state helium vapor cooling flow rate equivalent to a liquid helium boil-off rate of 0.98 l/hr, an over 40% reduction from the conventional all copper lead. Cut-off of helium vapor flow for 230 seconds poses no overheating problem and no performance degradation was observed after 1000 cycles of repetitive current cycling between 0 and 1000 A. A very low contact joint resistance, 17 n/spl Omega/ for carrying 1000 A, was also observed at the 4.2 K lead terminal.<>
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	777
Ending Page	781
Page Count	5
File Size	500151
File Format	PDF
ISSN	10518223
Volume Number	5
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Testing Prototypes High temperature superconductors Ceramics Copper Steady-state Temperature distribution Cooling Degradation
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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