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ŠIMEK, D. DOSTÁL, L. VALENTA, J.
Original Title
Detection of Local Softening, Welding and Formation of Metallic Bridges between the Copper Contact Pair Using Temperature Measurement
Type
conference paper
Language
English
Original Abstract
A paper is focused on the analysis of local softening, welding and formation of metallic bridges between the copper contact pair using temperature rise measurement. The contact pair is one of the most important and, at the same time, most problematic parts of the current-carrying path of electrical switching apparatuses, because of its power losses. Amount of power losses is mostly affected by a contact force and by a type of used contact material. Inappropriate choice of these parameters could lead to the extreme heating of contact pair and whole device. A material of contact is affected by a high temperature. Phenomena called local softening and welding may occur due to the high temperature. Metallic bridges create a permanent connection between the contacts. This permanent connection decreases a contact resistance, but unfortunately it disables the function of the entire switching device – the ability to break the electric circuit. The paper shows one of the possible solutions to the problem with on-line detection of phenomena between contact pair using temperature rise measurement.
Keywords
electrical switching devices, electrical contact, local softening, metallic bridge
Authors
ŠIMEK, D.; DOSTÁL, L.; VALENTA, J.
Released
15. 5. 2019
Publisher
VSB – Technical University of Ostrava
Location
Ostrava
ISBN
978-1-7281-1333-3
Book
Proceedings of the 2019 20th International Scientific Conference on Electric Power Engineering (EPE)
Edition
first
Pages from
141
Pages to
144
Pages count
4
URL
https://ieeexplore.ieee.org/abstract/document/8778097
BibTex
@inproceedings{BUT157061, author="David {Šimek} and Lukáš {Dostál} and Jiří {Valenta}", title="Detection of Local Softening, Welding and Formation of Metallic Bridges between the Copper Contact Pair Using Temperature Measurement", booktitle="Proceedings of the 2019 20th International Scientific Conference on Electric Power Engineering (EPE)", year="2019", series="first", pages="141--144", publisher="VSB – Technical University of Ostrava", address="Ostrava", doi="10.1109/EPE.2019.8778097", isbn="978-1-7281-1333-3", url="https://ieeexplore.ieee.org/abstract/document/8778097" }