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高温材料处理:国际期刊

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ISSN 打印: 1093-3611

ISSN 在线: 1940-4360

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.4 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00005 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.07 SJR: 0.198 SNIP: 0.48 CiteScore™:: 1.1 H-Index: 20

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ANALYSE AND MODELLING OF HIGH-VOLTAGE AND LOW-VOLTAGE CIRCUIT-BREAKERS ARCS

卷 8, 册 3, 2004, pp. 461-473
DOI: 10.1615/HighTempMatProc.v8.i3.110
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摘要

In this paper, we present the operation principles of high current circuit-breakers, the technological problems and the corresponding basic phenomena. For SF6 high-voltage circuit breaker (HVCB) where current interruption occurs near current zero (AC current) the main problems are related to the breakdown due to the recovery voltage and the presence of PTFE vapours. We emphasise the problems studied during the arc decay and the post-arc phase, showing the ability of 2D models including turbulence effects, to predict the plasma cooling and power interruption of the apparatus.
For LVCB, the arc created by contact separation is moved by hydrodynamic and magnetic forces, to an extinguishing chamber splitting the arc. The main problems are the displacement of the arc, plasma and gas flow, interaction with the walls and with the splitters, risk of restriking near the contacts and deposition of powders within the apparatus. We will present some models showing the 3-D movement of the plasma and the gas in the circuit-breaker chamber or able to predict the arc velocity in reasonable agreement with diagnostics results.

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