Erosion of silver-base material contacts by breaking arcs

Author

Kejian, Wang ; Qiping, Wang

Author_Institution

Xi´´an Jiaotong Univ., China

fYear

1990

fDate

20-24 Aug 1990

Firstpage

44

Lastpage

48

Abstract

The mechanism of material erosion of Ag-base material contacts caused by breaking arcs of up to several hundreds amperes are studied. The factors influencing the contact erosion are analyzed and it is suggested that the electrode erosion is the result of the heat-force effects among arc, electrodes and environment. The main cause of obvious material transfer is the asymmetry of the heat-force effects at two electrodes. It is indicated that there are two forms of liquid ejection; edge ejection and center ejection. The erosion modules are divided into several modes, and each is detailed. A mode diagram is proposed, and the erosion features of Ag-base materials are described

Keywords

circuit-breaking arcs; electrical contacts; silver; silver alloys; wear; Ag electrode; AgZnO contact; breaking arcs; center ejection; edge ejection; electrode erosion; erosion; heat-force effects; liquid ejection; material transfer; Anodes; Cathodes; Circuits; Electrodes; Frequency; Heat transfer; Inorganic materials; Materials testing; Reactive power; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Contacts, 1990. Proceedings of the Thirty-Sixth IEEE Holm Conference on ... and the Fifteenth International Conference on Electrical Contacts

Conference_Location

Montreal, Que.

Type

conf

DOI

10.1109/HOLM.1990.112993

Filename

112993