Types of contact contaminations in telecommunication and control switches

Author

Neufeld, Christian N. ; Rieder, Werner F. ; Strof, Thomas W.

Author_Institution

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

fYear

1994

fDate

17-19 Oct. 1994

Firstpage

111

Lastpage

118

Abstract

Contact reliability of relays, microswitches or auxiliary contacts may be endangered by various types of contact contaminations such as particles, corrosion products, polymers or carbon deposits. Often information about the type of contamination can be gained by easily applicable measurements of current and contact voltage only: contact resistance measurements-after each operation of a routine life test-employing increasing voltage-employing increasing current; and voltage oscillograms across opening contacts.

Keywords

contact resistance; corrosion; electric resistance measurement; electrical contacts; impurities; life testing; reliability; surface contamination; surface phenomena; switches; carbon deposits; contact contamination; contact reliability; control switches; corrosion products; microswitches; particles; polymers; relays; telecommunication switches; Contamination; Current measurement; Electrical resistance measurement; Gain measurement; Pollution measurement; Relays; Switches; Telecommunication control; Telecommunication switching; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Contacts, 1994. Proceedings of the Fortieth IEEE Holm Conference on Electrical Contacts

Print_ISBN

0-7803-2133-2

Type

conf

DOI

10.1109/HOLM.1994.636827

Filename

636827