Erosion phenomena for AgNi and AgSnO2 contacts in A.C low voltage switches

L. Chaâbane, M. Sassi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

The reliability of low voltage switches is verified by endurance tests (CEI- 60669-1). The most important problems are excessive wear and erosion or other harmful effect occurring in normal use, because of presence of electrical arc during making and braking operations.The subject of this work is experimental study of erosion phenomena of switches electrical contacts during their life. Tests are done for a.c switches with a rate voltage (250V) and a rate current (16A), and with AgNi and AgSnO2 contacts. Switches are tested with inductive loads (cosφ=0,6 and cosφ=0,3) and are subjected to 30000 operations at a uniform rate of 15 openinig-closing operations per minute. Based on contact mass variation during endurance tests, different behaviours have been observed for AgNi and AgSnO2 contacts. In switch endurance tests, contamination of contacts by carbonaceous deposits, coming from internal electrically insulated box of the switch, by a thermal phenomenon due to electrical arc, has masked contact mass loss and has shown magnitude and importance of this phenomenon.

Original languageBritish English
Title of host publicationProceedings of the 3rd International Conference on Reliability of Electrical Products and Electrical Contacts, ICREPEC 2009
EditorsJingying Zhao, Jingqin Wang
Pages112-114
Number of pages3
ISBN (Electronic)9789889968489
StatePublished - 2009
Event3rd International Conference on Reliability of Electrical Products and Electrical Contacts, ICREPEC 2009 - Wenzhou, China
Duration: 18 Oct 200921 Oct 2009

Publication series

NameProceedings of the 3rd International Conference on Reliability of Electrical Products and Electrical Contacts, ICREPEC 2009

Conference

Conference3rd International Conference on Reliability of Electrical Products and Electrical Contacts, ICREPEC 2009
Country/TerritoryChina
CityWenzhou
Period18/10/0921/10/09

Keywords

  • AgNi
  • AgSnO
  • Contact
  • Reliability
  • Switches

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