System response to relay chatter [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 1992.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: Pages: (5 pages) : digital, PDF file
Additional Creators:: Westinghouse Savannah River Company, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

An important aspect of the qualification of safety related systems, is the assessment of the possibility and consequences of seismic or vibration induced relay chatter. The current rules, contained in ANSI/IEEE C37.98 and the SQUG GIP, consider as seismic induced failure'' of a relay, a chatter contact in excess of 2 milliseconds. While this rule is clear in defining failure'' of single relay, the definition of failure'' becomes more problematic when we consider the alignment of an assembly of relays in series or parallel, and the effects of chatter on the function of the system in which the relays are mounted. In this paper, we report a method, based on system test and probabilities analysis, used to assess failure'' by relay chatter in an assembly of relays which control an electric motor. 2 refs.

Report Numbers:

E 1.99:wsrc-ms-92-124
E 1.99: conf-920631--21
conf-920631--21
wsrc-ms-92-124

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Note:

Published through SciTech Connect.
01/01/1992.
"wsrc-ms-92-124"
" conf-920631--21"
"DE92013076"
American Society of Mechanical Engineers pressure vessel and piping conference, New Orleans, LA (United States), 21-25 Jun 1992.
Antaki, G.A.; Radder, J.A.

Funding Information:

AC09-89SR18035

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