Electrical properties of commercial sheet insulation materials for cryogenic applications

Conference · Tue Jan 01 00:00:00 EST 2008

OSTI ID:958907

Tuncer, Enis ^[1]; Sauers, Isidor ^[1]; James, David Randy ^[1]; Ellis, Alvin R ^[1]; Pace, Marshall O ^[1]

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1. ORNL

Dielectric properties of electrical insulation materials are needed for low-temperature power applications. Performance of materials and their compatibility determine the size of the electrical insulation in power equipment. In this work we report the dielectric properties of some commercially available materials in sheet form. The selected materials are polypropylene laminated paper from Sumitomo Electric U.S.A., Inc., porous polyethylene (Tyvek\texttrademark) from Dupont, and polyamide paper (Nomex\texttrademark) from Dupont. The dielectric properties are characterized with an electrical impedance analyzer in the frequency domain. The impedances are recorded in a cryocooler in the temperature range from 50 to 300 K. The dielectric breakdown characteristics of the materials are measured in a liquid nitrogen bath at atmospheric pressure.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: OE USDOE - Office of Electric Transmission and Distribution
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 958907
• Resource Relation: Conference: CEIDP 2008, Quebec city, Canada, 20081026, 20081029
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ATMOSPHERIC PRESSURE
BREAKDOWN
COMPATIBILITY
CRYOGENICS
DIELECTRIC MATERIALS
DIELECTRIC PROPERTIES
ELECTRICAL INSULATION
ELECTRICAL PROPERTIES
IMPEDANCE
NITROGEN
PERFORMANCE
POLYAMIDES
POLYETHYLENES
POLYPROPYLENE
Dielectric breakdown
cryogenic dielectrics