Proceedings of the 50th IEEE Holm Conference on Electrical Contacts and the 22nd International Conference on Electrical Contact
DOI: 10.1109/holm.2004.1353147
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Micro-arcs at make and break processes

Abstract: Micro-arcs appear at micro-roughness spots in making and breaking contact. With the help of contact distance measurements, a delay of the making process as well as an acceleration of the breaking process are detected. Both phenomena can be explained as an explosion-like vaporisation of contact material being sometimes initiated by a micro-arc ignition. These effects are the reasons of the contact material losses and the welding behaviour. Above all, the change of the contact surface structure is responsible fo… Show more

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