Title :
Arc mobility on new and eroded Ag/CdO and Ag/SnO2 contacts
Author :
Manhart, H. ; Reider, W. ; Veit, V.
Author_Institution :
Dept. of Switching Devices, Tech. Univ. of Vienna, Austria
Abstract :
The mobility of break arcs in a magnetic blast-field was investigated in both a model switch and a commercial contactor. After contact separation, three arc motion phenomena were measured independently: initial reduced arc motion (immobility and creeping), subsequent running, and final commutation from the contacts to the arc runners. Contacts made from Ag/CdO and from Ag/SnO/sub 2/ were compared in both new and eroded states. The results of erosion measurements under various stress conditions were consistent with the mobility phenomena observed.<>
Keywords :
circuit breakers; circuit-breaking arcs; composite materials; contactors; electrical contacts; silver alloys; AC3; AC4; Ag-CdO contacts; Ag-SnO/sub 2/ contacts; arc commutation to arc runners; arc motion phenomena; circuit breaking arcs; commercial contactor; contact erosion; contact materials; contact separation; eroded states; magnetic blast-field; mobility of break arcs; model switch; new condition; reduced arc motion; stress conditions; surface conditions; Contactors; IEC; Life testing; Magnetic separation; Motion detection; Motion measurement; Performance evaluation; Stress; Time measurement; Voltage;
Conference_Titel :
Electrical Contacts, 1988., Proceedings of the Thirty Fourth Meeting of the IEEE Holm Conference on
Conference_Location :
San Francisco, CA, USA
DOI :
10.1109/HOLM.1988.16093
