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Title: Superconducting Cable Termination

Abstract

Disclosed is a termination that connects high temperature superconducting (HTS) cable immersed in pressurized liquid nitrogen to high voltage and neutral (shield) external bushings at ambient temperature and pressure. The termination consists of a splice between the HTS power (inner) and shield (outer) conductors and concentric copper pipes which are the conductors in the termination. There is also a transition from the dielectric tape insulator used in the HTS cable to the insulators used between and around the copper pipe conductors in the termination. At the warm end of the termination the copper pipes are connected via copper braided straps to the conventional warm external bushings which have low thermal stresses. This termination allows for a natural temperature gradient in the copper pipe conductors inside the termination which enables the controlled flashing of the pressurized liquid coolant (nitrogen) to the gaseous state. Thus the entire termination is near the coolant supply pressure and the high voltage and shield cold bushings, a highly stressed component used in most HTS cables, are eliminated. A sliding seal allows for cable contraction as it is cooled from room temperature to ˜72-82 K. Seals, static vacuum, and multi-layer superinsulation minimize radial heat leak to themore » environment.« less

Inventors:
 [1];  [2]
  1. Carrollton, GA
  2. Newnan, GA
Publication Date:
Research Org.:
Southwire Company (Carrollton, GA)
OSTI Identifier:
880069
Patent Number(s):
US 6,936,771
Application Number:
10/492385
Assignee:
Southwire Company (Carrollton, GA)
DOE Contract Number:  
FC36-98GO10286
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Sinha, Uday K, and Tolbert, Jerry. Superconducting Cable Termination. United States: N. p., 2005. Web.
Sinha, Uday K, & Tolbert, Jerry. Superconducting Cable Termination. United States.
Sinha, Uday K, and Tolbert, Jerry. Tue . "Superconducting Cable Termination". United States. https://www.osti.gov/servlets/purl/880069.
@article{osti_880069,
title = {Superconducting Cable Termination},
author = {Sinha, Uday K and Tolbert, Jerry},
abstractNote = {Disclosed is a termination that connects high temperature superconducting (HTS) cable immersed in pressurized liquid nitrogen to high voltage and neutral (shield) external bushings at ambient temperature and pressure. The termination consists of a splice between the HTS power (inner) and shield (outer) conductors and concentric copper pipes which are the conductors in the termination. There is also a transition from the dielectric tape insulator used in the HTS cable to the insulators used between and around the copper pipe conductors in the termination. At the warm end of the termination the copper pipes are connected via copper braided straps to the conventional warm external bushings which have low thermal stresses. This termination allows for a natural temperature gradient in the copper pipe conductors inside the termination which enables the controlled flashing of the pressurized liquid coolant (nitrogen) to the gaseous state. Thus the entire termination is near the coolant supply pressure and the high voltage and shield cold bushings, a highly stressed component used in most HTS cables, are eliminated. A sliding seal allows for cable contraction as it is cooled from room temperature to ˜72-82 K. Seals, static vacuum, and multi-layer superinsulation minimize radial heat leak to the environment.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {8}
}

Patent:

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