The effects of shipyards' environment in electrical contacts crossing resistance

Psomopoulos, CS; Aronis, CG; Karagiannopoulos, CG; Bourkas, PD

dc.contributor.author	Psomopoulos, CS	en
dc.contributor.author	Aronis, CG	en
dc.contributor.author	Karagiannopoulos, CG	en
dc.contributor.author	Bourkas, PD	en
dc.date.accessioned	2014-03-01T02:49:55Z
dc.date.available	2014-03-01T02:49:55Z
dc.date.issued	2004	en
dc.identifier.issn	14827891	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/34791
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-11844281575&partnerID=40&md5=86f3d98a94f03aab0f6dfc5f870f8736	en
dc.subject	Crossing resistance	en
dc.subject	Digital measurements for evaluation	en
dc.subject	Electrical contacts	en
dc.subject	Non - Linear conductivity	en
dc.subject	Shipyards environmental conditions	en
dc.subject.other	Current voltage characteristics	en
dc.subject.other	Electric conductivity	en
dc.subject.other	Electric resistance	en
dc.subject.other	Electric variables measurement	en
dc.subject.other	Switching	en
dc.subject.other	Thermal effects	en
dc.subject.other	Waveform analysis	en
dc.subject.other	Crossing resistance	en
dc.subject.other	Digital measurements for evaluation	en
dc.subject.other	Nonlinear conductivity	en
dc.subject.other	Shipyards environmental conditions	en
dc.subject.other	Electric contacts	en
dc.title	The effects of shipyards' environment in electrical contacts crossing resistance	en
heal.type	conferenceItem	en
heal.identifier.secondary	442-218	en
heal.publicationDate	2004	en
heal.abstract	In this work, an experimental investigation is attempted, concerning the effects of the shipyards' industries environment in the operation of electrical contacts. Analog to digital measurements were performed and physical interpretations of the dominant phenomena are presented. The experimental setup is in agreement with IEC0660 specifications concerning switch overheat tests. The specimens were installed in electrical panels near by piers and docks and had the following nominal characteristics: isolators 500V/250A, and relays 500V/250A. The measurements were performed through A/D converters with a sampling frequency of 50MHz. Waveforms of the voltage drop and current were obtained for the usual load values of the specimens. Current-voltage plots (I-V plots) are also presented. Further analysis of the data obtained is performed and it is concluded that the interfacial layer determines the conduction mechanisms. In this case the contacts usually operate in advanced degradation (due to pollution and sea) thus the current conduction is mainly attributed to field emission or field ionisation processes. The above dominant effects characterize high rates of electronic conduction via stationary metal contacts at a state where linear behavior has ceased and instabilities are developed. The results lead to an effective evaluation test for contacts installed in shipyards and could aid in the maintenance procedures.	en
heal.journalName	Series on Energy and Power Systems	en
dc.identifier.spage	478	en
dc.identifier.epage	483	en