Title :
Make erosion mechanism of Ag/CdO and Ag/SnO2 contacts
Author :
Rieder, Werner ; Weichsler, Valentin
Author_Institution :
Inst. of Switching Devices & High Voltage Technol., Tech. Univ. of Vienna, Austria
fDate :
6/1/1992 12:00:00 AM
Abstract :
The reason for the different make-erosion behavior of contactor contacts made from Ag/CdO and Ag/SnO2, respectively, has been investigated at 400 A, separating the combined effects of the thermal stress due to the bounce arc and of the mechanical stress due to contact closure. It appeared that neither arcing without mechanical stress nor no-load switching without arcing are able to produce serious mass losses. Only the combined action of bounce arcs followed by mechanical impacts cause severe erosion phenomena, which is more pronounced in Ag/SnO2 contacts, losing more obviously weakly adhering matter due to mechanical effects
Keywords :
cadmium compounds; contactors; electrical contacts; materials testing; silver alloys; tin compounds; 400 A; AC3 tests; Ag-CdO contacts; Ag-SnO2 contacts; bounce arc; combined action; contact bouncing; contact closure; contact erosion; contact make; contact materials; contactor contacts; erosion mechanism; erosion phenomena; make-erosion behavior; mass losses; mechanical impacts; mechanical stress; thermal stress; Capacitors; Contacts; Diodes; Electrodes; Helium; IEC standards; Loss measurement; Materials testing; Thermal stresses; Voltage;
Journal_Title :
Components, Hybrids, and Manufacturing Technology, IEEE Transactions on
