Title :
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
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;
Conference_Titel :
Electrical Contacts, 1993., Proceedings of the Thirty-Ninth IEEE Holm Conference on
Conference_Location :
Pittsburgh, PA
Print_ISBN :
0-7803-1270-8
DOI :
10.1109/HOLM.1993.489654
