Mechanisms Responsible for Arc Cooling in Different Gases in Turbulent Nozzle Flow
DOI:
https://doi.org/10.14311/ppt.2017.3.234Keywords:
SF6 replacement, SF6 alternative gases, switching arcAbstract
A high voltage gas blast circuit breaker relies on the high speed gas flow in a nozzle to remove the energy due to Ohmic heating at high current and to provide strong arc cooling during the current zero period to interrupt a fault current. The physical mechanisms that are responsible for the hugely different arc cooling capabilities of two gases (SF6 and air) are studied in the present work and important gas material properties controlling the cooling strength identified.References
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