Final report on preliminary dielectric studies. Spir-o-line cable for application at power frequencies

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Description

Preliminary studies were made on a unique dielectric system for both flexible and rigid power cable applications. Known as Spir-O-Line, it was developed and is manufactured by Prodelin, Inc. as a high power radio frequency transmisson system, with a service record of several decades. The cable consists of a central conductor continuously supported by six high density polyethylene tubes inside a metal sheath, which operates as a GITL with either nitrogen or SF/sub 6/ as the filling medium. A rough analysis of the dielectric geometry concluded that its breakdown strength might be improved over that of the open coaxial conductor ... continued below

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Pages: 55

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Engelhardt, J.S. December 4, 1978.

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Description

Preliminary studies were made on a unique dielectric system for both flexible and rigid power cable applications. Known as Spir-O-Line, it was developed and is manufactured by Prodelin, Inc. as a high power radio frequency transmisson system, with a service record of several decades. The cable consists of a central conductor continuously supported by six high density polyethylene tubes inside a metal sheath, which operates as a GITL with either nitrogen or SF/sub 6/ as the filling medium. A rough analysis of the dielectric geometry concluded that its breakdown strength might be improved over that of the open coaxial conductor configuration. A series of breakdown tests was performed on the smaller range of commercially available sizes. The results confirmed the expected behavior patterns, but did not fully explore the upper units of performance due to occasional tube separations in the samples tested. The potential voltage ratings of the larger available sizes were estimated and found to be from 69 kV to 138 kV for a 3-inch O.D. size, and from 138 kV to 230 kV for a 6-inch O.D. size. There is considerable flexibility in the design of the conductor due to the continuous support of the dielectric tubes. In addition, the system enjoys efficient utilization of material and a low cost, low energy manufacturing process. The system economics appear competitive with conventional systems at conventional power ratings. For these reasons, a full-scale development and demonstration project is strongly recommended.

Physical Description

Pages: 55

Notes

Dep. NTIS, PC A04/MF A01.

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  • Report No.: HCP/T5054-01
  • Grant Number: EG-77-C-01-5054
  • DOI: 10.2172/6271685 | External Link
  • Office of Scientific & Technical Information Report Number: 6271685
  • Archival Resource Key: ark:/67531/metadc1106625

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • December 4, 1978

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

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  • March 23, 2018, 4:17 p.m.

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Engelhardt, J.S. Final report on preliminary dielectric studies. Spir-o-line cable for application at power frequencies, report, December 4, 1978; United States. (digital.library.unt.edu/ark:/67531/metadc1106625/: accessed September 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.