Electrical contact overheating under short-circuit currents

Filippakou, MP; Karagiannopoulos, CG; Agoris, DP; Bourkas, PD

dc.contributor.author	Filippakou, MP	en
dc.contributor.author	Karagiannopoulos, CG	en
dc.contributor.author	Agoris, DP	en
dc.contributor.author	Bourkas, PD	en
dc.date.accessioned	2014-03-01T01:16:33Z
dc.date.available	2014-03-01T01:16:33Z
dc.date.issued	2001	en
dc.identifier.issn	0378-7796	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14074
dc.subject	Cross Section	en
dc.subject	Mathematical Model	en
dc.subject	Power Supply	en
dc.subject	Short Circuit Current	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.other	Electric conductors	en
dc.subject.other	Mathematical models	en
dc.subject.other	Short circuit currents	en
dc.subject.other	Thermal effects	en
dc.subject.other	Electrical contact overheating	en
dc.subject.other	Electric contacts	en
dc.title	Electrical contact overheating under short-circuit currents	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0378-7796(01)00081-5	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0378-7796(01)00081-5	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	In this paper, a method is proposed, concerning the temperature rise estimation at stationary electrical contacts, operating in the power supply network, during short-circuit. The method consists in the formation of a mathematical model, which simulates the operation of the contact/conductors system under heavy fault currents. The model comprises analytical mathematical expressions that enable temperature estimations lengthwise the aforementioned system. From the analysis results, it can be concluded that the conductor (bar) cross-section is of primary importance as far as overheating is concerned. It is convincingly shown that the equipment deterioration can be delayed by lowering the maximum contact temperature during, short-circuit transient phenomena. An approximate equation is also proposed as an extra calculating test for the contact and bar overheating under short-circuit conditions. The proposed model could be a criterion for the selection of conductors and switchgear components. (C) 2001 Elsevier Science B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	Electric Power Systems Research	en
dc.identifier.doi	10.1016/S0378-7796(01)00081-5	en
dc.identifier.isi	ISI:000168599500011	en
dc.identifier.volume	57	en
dc.identifier.issue	2	en
dc.identifier.spage	141	en
dc.identifier.epage	147	en