The Analysis of Fire Characteristics of Tumbler Switches due to Deterioration of Contacts

Author

Choi, Chung-Seog ; Kim, Dong-Woo ; Kim, Young-Seog ; Lee, Ki-Yeon

Author_Institution

Electr. Safety Res. Inst., Korea Electr. Safety Corp., Gyeonggi-Do

fYear

2006

fDate

38869

Firstpage

944

Lastpage

947

Abstract

In this paper, the fire characteristics and mechanisms were analyzed according to deterioration of the contacts of tumbler switches. In order to deteriorate the contacts of tumbler switches, 1% NH₄Cl solution was dripped at the contacts of tumbler switches for 1 hour at a rate of 1 drop per second. During switching on and off, arc dispersion was taken by digital camera and high speed imaging system, and then the size and the duration of arc were recorded and analyzed. Tumbler switches were switched on and off from 10000, 30000, 50000 and 70000 times respectively in order to discover the deterioration characteristics of contacts caused by arc. After switching repetition, damaged contacts and insulators were compared to normal contacts and insulators. The results could be applicable to fire cause analysis of electrical appliances such as tumbler switches

Keywords

arcs (electric); digital photography; electrical accidents; electrical contacts; electrical safety; fires; high-speed techniques; insulators; switches; arc dispersion; contacts deterioration; deterioration characteristics; digital camera; electrical appliances; fire cause analysis; fire characteristics; high speed imaging system; insulators; switching repetition; tumbler switches; Contacts; Digital cameras; Electrical products; Electrical safety; Fires; Image analysis; Insulation; Shape; Switches; Switching circuits; arc; contacts; deterioration; switching; tumbler switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and applications of Dielectric Materials, 2006. 8th International Conference on

Conference_Location

Bali

Print_ISBN

1-4244-0189-5

Electronic_ISBN

1-4244-0190-9

Type

conf

DOI

10.1109/ICPADM.2006.284333

Filename

4062822