Investigations of Nozzle Materials in SF6 Circuit Breakers

With a puffer and a self-blast type SF6 circuit breaker (CB), various nozzle materials have been investigated. In addition, a small-scaled model SF6 breaker has been attached to a time-of-flight mass spectrometer (TOFMS) in order to study the exhausted gas contaminated with ablated material. The exp...

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Bibliographic Details
Published inIEEE transactions on plasma science Vol. 14; no. 4; pp. 390 - 394
Main Authors Meier, R., Kneubuhl, F. K., Coccioni, R., Wyss, H., Fischer, E., Schotzau, H. J.
Format Journal Article
LanguageEnglish
Published New York, NY IEEE 01.08.1986
Institute of Electrical and Electronics Engineers
Subjects
Applied sciences
Chemicals
Circuit breakers
Composite materials
Connection and protection apparatus
Corrosion
Dielectric materials
Electrical engineering. Electrical power engineering
Electrodes
Exact sciences and technology
Geometry
Mass spectroscopy
Sulfur hexafluoride
Testing
Circuit breaker
Electric arc
Solid dielectric
Insulator
Stability
Nozzle
Properties of materials
Specification
Pneumatic apparatus
Plastics
SF6 switching device
Electric device
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Summary:With a puffer and a self-blast type SF6 circuit breaker (CB), various nozzle materials have been investigated. In addition, a small-scaled model SF6 breaker has been attached to a time-of-flight mass spectrometer (TOFMS) in order to study the exhausted gas contaminated with ablated material. The experimental results clearly show an influence of the nozzle material on the interrupting capability of the SF6 CB. The observed nozzle ablation is mainly determined by the geometry of the arcing device. The erosion of the nozzle and the chemical composition of arced SF6 gas depend slightly on the quality of the PTFE nozzles only.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.1986.4316566