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Electro-mechanical properties of composite materials for high-current contact applications

Felberbaum, L
Published in Journal of Physics. D, Applied Physics. 2014, vol. 47, no. 12, p. 125501
Abstract We report a detailed study that compares various composite materials (CM): Ag/ZnO, Ag/SnO2, Ag/C, Ag/WC, Ag/WC–C and Ag/Ni used in high-current dc circuit breaker applications. Their structural, mechanical, electrical and wetting properties were investigated. In parallel, switching operation tests on the same compounds were performed on commercial high-speed circuit breakers under real conditions (30 kA–900 V). A correlation between the microscopic variables and switching performances of the CMs was established. Materials like Ag/WC and Ag/WC–C were found to be unsuitable for the reliable functionality of the device. In contrast, Ag/C and Ag/SnO2 materials with high electrical and high thermal conductivity revealed remarkably good behaviour during switching operation tests.
Keywords Electrical contact materialsCircuit breakersMaterial properties
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JACIMOVIC, Jacim et al. Electro-mechanical properties of composite materials for high-current contact applications. In: Journal of Physics. D, Applied Physics, 2014, vol. 47, n° 12, p. 125501. doi: 10.1088/0022-3727/47/12/125501 https://archive-ouverte.unige.ch/unige:35126

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Deposited on : 2014-03-31

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