NDLI: Aluminum bus for shipboard application

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Aluminum bus for shipboard application

Content Provider	IEEE Xplore Digital Library
Author	Thompson, G. J. Behr, S. H.
Copyright Year	2012
Abstract	THERE is special interest in aluminum for shipboard use because of the savings realized in weight and because of shortages in copper that occur especially in times of national emergency when shipbuilding is at its peak. Although aluminum has been considered for cable conductors for shipboard use it is generally without over-all advantage because the larger conductor size results in a greater volume and weight of insulating and sheathing materials. These factors involving insulation are not imposed in applying aluminum to electrical bus. In utilizing aluminum bus for switchgear application problems arise that are mostly but not entirely confined to the making of satisfactory electric connections. The literature on the subject contains a large body of information. Much effort is devoted to coping with a particular environmental stress or material property considered to predominate in the reliability of a specific system. Some of the work stresses the advantage of a proprietary material or a particular method. Instances of controversy are attributed largely to differences of conditions of evaluation and as such appear best capable of resolution by re-evaluation on the same basis. The rather extreme conditions and their wide variety in shipboard service justify additional evaluation. A comprehensive experimental investigation was therefore carried out to determine the optimum means of utilizing aluminum bus in switchgear with the primary objective of long-term service reliability. Measurements taken on large numbers of specimens determine the extent to which different types of aluminum joined by various bolting methods, and with joint surfaces prepared with various joint compounds, are affected by prolonged load cycling, overload, weathering, vibration, and high impact shock; similarly tested is the extent to which silver platings are affected. Measurements on an actual marine installation after 20 years of service are correlated with the results of experimental laboratory work. In addition, information is provided which is useful in the design of bus supports needed to withstand fault currents.
Starting Page	239
Ending Page	247
Page Count	9
File Size	7244971
File Format	PDF
ISSN	00972185
Volume Number	78
Issue Number	4
Language	English
Publisher	American Institute of Electrical Engineers
Publisher Date	1959-09-01
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Joints Resistance Aluminum Fasteners Electrical resistance measurement Compounds
Content Type	Text
Resource Type	Article

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