Influence of PTFE ablation on the performance of high voltage self-blast circuit breaker

Self-blast circuit breakers utilize the energy dissipated by the arc itself to create the required conditions for arc quenching during the current zero. The arc energy induces ablation of the PTFE nozzle. Ablated nozzle shape and SF 6 -PTFE mixture vapor affect the performance of a self-blast circui...

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Bibliographic Details
Published in2009 Transmission & Distribution Conference & Exposition: Asia and Pacific pp. 1 - 4
Main Authors Man-Jun Ha, Jinbum Kim, Chang-Ho Yeo, Ki-Yeoung Kweon
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2009
Subjects
Ablation
Arc Plasma
Asia
Circuit breakers
Computational Fluid Dynamics
Self-blast circuit breaker
SF6-PTFE mixture vapor
Voltage
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Summary:Self-blast circuit breakers utilize the energy dissipated by the arc itself to create the required conditions for arc quenching during the current zero. The arc energy induces ablation of the PTFE nozzle. Ablated nozzle shape and SF 6 -PTFE mixture vapor affect the performance of a self-blast circuit breaker. After a number of tests nozzle in circuit breaker is disassembled, and ablation of the nozzle is investigated precisely. Using computational fluid dynamics (CFD), temperature, pressure, velocity and electric fields inside the circuit breaker are calculated. Performance of ablated nozzle shape and different amount of PTFE ablation mass flux is compared with original model using CFD code.
ISSN:2160-8636
2160-8644
DOI:10.1109/TD-ASIA.2009.5356810