Physical interpretations concerning non-linear conductivity phenomena across no-load switching contacts

Karagiannopoulos, CG; Bourkas, PD; Dervos, CT; Kagarakis, CA

dc.contributor.author	Karagiannopoulos, CG	en
dc.contributor.author	Bourkas, PD	en
dc.contributor.author	Dervos, CT	en
dc.contributor.author	Kagarakis, CA	en
dc.date.accessioned	2014-03-01T02:40:55Z
dc.date.available	2014-03-01T02:40:55Z
dc.date.issued	1990	en
dc.identifier.issn	03614395	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30284
dc.subject	Electric Field	en
dc.subject	Metallic Surface	en
dc.subject	Negative Differential Conductance	en
dc.subject.other	Electric Conductivity	en
dc.subject.other	Electric Contacts - Electric Conductivity	en
dc.subject.other	No-Load Switching Contacts	en
dc.subject.other	Nonlinear Conductivity Phenomena	en
dc.subject.other	Switch Overheat Tests	en
dc.subject.other	Electric Switches	en
dc.title	Physical interpretations concerning non-linear conductivity phenomena across no-load switching contacts	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/HOLM.1990.113067	en
heal.identifier.secondary	http://dx.doi.org/10.1109/HOLM.1990.113067	en
heal.publicationDate	1990	en
heal.abstract	An experimental survey concerning physical interpretations of the dominant phenomena which may develop during the operation of no-load switching contacts in laboratory environments is presented. Measurements are performed on industrial switches with the following nominal values: isolation switches 400 V/100 A, isolation switches 20 kV/200 A, and fuse isolators 20 kV/100 A. It is shown that beyond a threshold field intensity (corresponding to smaller currents than the nominal values) a nonlinear current-voltage relationship may develop, leading to bistability and negative differential conductance phenomena. This has been attributed to the dominating tunnelling current component between oxidized (or nonideally contacted) metallic surfaces at high electric fields, resulting in an increased effective area of contact.	en
heal.publisher	Publ by Illinois Inst of Technology, Chicago, IL, United States	en
heal.journalName	Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts	en
dc.identifier.doi	10.1109/HOLM.1990.113067	en
dc.identifier.spage	611	en
dc.identifier.epage	618	en