Diagnostic measurements on rotary arcs in hollow polymeric cylinders

Rotary arcs in hollow polymeric cylinders have been monitored using electrical and optical techniques. The arcs burning within hollow cylinders were driven by electromagnetic forces. The arc voltage, current, dielectric strength below the arc gap, the optical emissions from the chamber were measured...

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Bibliographic Details
Published in:IEEE transactions on power delivery 2005-04, Vol.20 (2), p.765-771
Main Authors: Mori, T., Spencer, J.W., Humphries, J., Jones, G.R.
Format: Article
Language:English
Subjects:
Ablation
arc discharge
circuit breakers
Combustion
Cylinders
Dielectric breakdown
Dielectric measurements
Dielectric strength
Electric potential
Electromagnetic forces
Electromagnetic measurements
High speed optical techniques
Magnetic field measurement
Magnetic fields
Monitoring
optical fiber measurements
Optical polymers
Polytetrafluoroethylenes
Stimulated emission
Voltage
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Summary:Rotary arcs in hollow polymeric cylinders have been monitored using electrical and optical techniques. The arcs burning within hollow cylinders were driven by electromagnetic forces. The arc voltage, current, dielectric strength below the arc gap, the optical emissions from the chamber were measured along with high-speed photography. The diameters of the hollow cylinders and magnitude of the applied magnetic field were varied. The arc voltage, especially the extinction peak prior to current zero, increased for larger bore cylinders and higher magnetic fields. By comparing the arc voltage waveforms and arc photographs, this was shown to be because the arcs were elongated. Luminosity was detected even after current zero, when polytetrafluoroethylene was in the arc chamber. The extensive experimental results obtained have enabled empirical mathematical expressions to be derived which yield approximate indications of current interruption capabilities under different operating conditions.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2004.838635