Electrical contact tempereature change after short-circuit current

Andrzej Książkiewicz; Jerzy Janiszewski

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Title

Electrical contact tempereature change after short-circuit current

Authors

Andrzej Książkiewicz (WE) ^{[ 1 ][ P ]}
Jerzy Janiszewski (WE) ^{[ 1 ][ P ]}

^{[ 1 ]} Instytut Elektroenergetyki, Wydział Elektryczny, Politechnika Poznańska | ^{[ P ]} employee

Year of publication

2014

Published in

Poznan University of Technology Academic Journals. Electrical Engineering

Journal year: 2014 | Journal number: Issue 78

Article type

scientific article

Publication language

english

Keywords

EN

contact materials
contact resistance
Joule's heat

Abstract

EN Theoretical analysis is preformed concerning temperature rise of electrical contacts exposed to short-circuit current. This temperature is calculated for three different contact materials: AgNi, AgCdO and AgSnO2, used in low voltage electromagnetic relays. An assumption is made that the heat process is adiabatic. Amount of heat is calculated based on let-through energy (Joules heat) of miniature circuit breaker and on real electrical contact resistance. A simplified model of electrical contact heating is proposed.

Pages (from - to)

65 - 70

Presented on

Computer Applications in Electrical Engineering 2014, 28-29.04.2014, Poznań, Polska

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Ministry points / journal

9

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