Development of SR-UEW polyurethane wire for use in sealed relays

Author

Takeuchi, Akihisa ; Kozen, W. ; Yamamoto, Teruyuki ; Nakabayashi, Hirohiko ; Fukagaya, Masato ; Miyake, Sadamitsu

Author_Institution

Sumitomo Electr. Ind. Ltd., Nagoya, Japan

fYear

1989

fDate

25-28 Sep 1989

Firstpage

185

Lastpage

190

Abstract

A high-reliability SR-UEW polyurethane wire for use in sealed relays has been developed. SR-UEW is a magnet wire that minimizes the amount of organic gas emitted by the wire insulation and uses no lubrication or oils for surface treatment, without sacrificing windability in the coiling process. Analysis of generated organic gases showed little cresolic acid, which adversely affects relay contacts, and no paraffin was detected. As a result, the life of relay contacts was greatly extended compared to that of relay contacts using the conventional product and the degassed conventional product. Specifically, this product showed a life 10 to 100 times longer than that of conventional urethane wire. The amount of gas generated over long periods is about one-fourth of that generated by the degassed conventional product

Keywords

insulated wires; organic insulating materials; polymers; relays; SR-UEW polyurethane wire; cresolic acid; life; magnet wire; organic gas; relay contacts; sealed relays; windability; wire insulation; Cleaning; Coils; Conductive films; Gases; Lubricants; Magnetic flux; Magnetic materials; Printed circuits; Relays; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Electronics Insulation Conference, 1989. Chicago '89 EEIC/ICWA Exposition., Proceedings of the 19th

Conference_Location

Chicago, IL

Type

conf

DOI

10.1109/EEIC.1989.208221

Filename

208221