Cryogenic tests of glass-epoxy-based electrical insulation

Journal Article · Fri Jan 01 04:00:00 EST 1982 · Adv. Cryog. Eng.; (United States)

DOI:https://doi.org/10.1007/978-1-4613-3542-9_29· OSTI ID:6016902

Taylor, J D; Green, M A; Martin, P S; Pripstein, M

Experience with several superconducting coils has proven that glass cloth vacuum-impregnated with epoxy is an excellent material for cryogenic applications from the mechanical standpoint. This paper investigates several types of glass cloth and composites which contain glass cloth. The samples primarily were given a sandwich construction (illustrated) of glass cloth and wire, then impregnated with epoxy, and then were subjected to severe thermal shock by being dipped in liquid nitrogen until boiling stopped, after which they were dipped in warm water. This cycle was repeated 25 times. following thermal cycling, the samples were tested at voltages incremented to an upper limit of 25 kV. The samples were held for 60 seconds at each voltage. Twentythree samples were tested; the results are summarized in tables. Conclusions tend to prefer glass-epoxy such as FR-4 or NEMA G-10. Newer matrials such as Kapton or Nomex look promising for future development.

• Research Organization: University of California, Berkeley, CA
• OSTI ID: 6016902
• Journal Information: Adv. Cryog. Eng.; (United States), Journal Name: Adv. Cryog. Eng.; (United States) Vol. 28; ISSN ACYEA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
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42 ENGINEERING
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ELECTRICAL INSULATION
FAILURE MODE ANALYSIS
LOW TEMPERATURE
MATERIALS TESTING
SUPERCONDUCTING COILS
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
TESTING