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Comparison of Arc Tracking Tests in Various Aerospace EnvironmentsMomentary short-circuit arcs between a polyimide insulated wire with defective insulation and another conductor may cause pyrolization of the insulation resulting in a conductive path capable of sustaining the arc. These sustained arcs may propagate along the wires or to neighboring wires leading to complete failure of the wire bundle. Wire insulation susceptibility to arc tracking may be dependent on its environment. Because all wire insulation types tested to date arc track, a test procedure has been developed to compare different insulation types with respect to their arc tracking susceptibility. This test procedure is presented along with a comparison of arc tracking in the following three environments: (1) Air at atmospheric pressure and 1 gravitational(g) force; (2) Vacuum (2.67 x 10(exp -3) Pa) and 1g, and (3) Air at atmospheric pressure and microgravity (less than 0.04g).
Document ID
19960017832
Document Type
Contractor Report (CR)
Authors
Stueber, Thomas J. (NYMA, Inc. Brook Park, OH United States)
Hammoud, Ahmad (NYMA, Inc. Brook Park, OH United States)
McCall, David (Cleveland State Univ. OH United States)
Date Acquired
September 6, 2013
Publication Date
March 1, 1996
Subject Category
Quality Assurance and Reliability
Report/Patent Number
NASA-CR-198463
E-10149
NAS 1.26:198463
Meeting Information
1996 International Symposium on Electrical Insulations(Montreal)
Funding Number(s)
PROJECT: RTOP 323-15-03
CONTRACT_GRANT: NAS3-27186
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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NameType 19960017832.pdf STI