The influence of bounce parameters on the make erosion of silver/metal-oxide contact materials

Author

Hetzmannseder, E. ; Rieder, W.

Author_Institution

Inst. of Switching Devices & High Voltage Technol., Tech. Univ. Wien, Austria

fYear

1993

fDate

27-29 Sep 1993

Firstpage

11

Lastpage

18

Abstract

The influence of the bounce parameters (bounce arc duration, bounce height and static contact force, current and magnetic induction) on the make only erosion was investigated by systematic variation of each single parameter value in a bounce model switch. The model switch simulates bounces occurring in modern contactors. Ag/SnO₂ suffered either three times higher or about 50% lower erosion losses than Ag/CdO depending on the manufacturing process (internally oxidized, powder metallurgically produced) and/or the additives of the materials, and therefore on the structure of the materials rather than on the kind of metal oxide component (CdO or SnO₂). The different make erosion rates of the materials investigated have been correlated with the micro structure of their stressed surfaces

Keywords

cadmium compounds; contactors; electrical contacts; silver; tin compounds; wear; Ag-CdO; Ag-SnO₂; additives; arc duration; bounce parameters; contactors; current; internal oxidation; magnetic induction; make erosion; manufacturing process; microstructure; model switch; powder metallurgy; silver/metal-oxide contact materials; static contact force; stressed surfaces; Additives; Contactors; Contacts; Force measurement; Force sensors; Inorganic materials; Powders; Silver; Switches; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Contacts, 1993., Proceedings of the Thirty-Ninth IEEE Holm Conference on

Conference_Location

Pittsburgh, PA

Print_ISBN

0-7803-1270-8

Type

conf

DOI

10.1109/HOLM.1993.489654

Filename

489654