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Vacuum Breaker for High DC Current: Experimental Performances and Operational Limits (Articolo in rivista)

Type

Label

Vacuum Breaker for High DC Current: Experimental Performances and Operational Limits (Articolo in rivista) (literal)

Anno

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Alternative label

Piovan R.; Zanotto L.; Bonicelli T. (2009)
Vacuum Breaker for High DC Current: Experimental Performances and Operational Limits
in IEEE transactions on plasma science
(literal)

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Rivista

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Note

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1, 2: Consorzio RFX, Associazione EURATOM-ENEA sulla Fusione, Corso Stati Uniti 4, I-35127 Padova, Italy / 3: Fusion For Energy, C/ Josep Pla 2, 08019 Barcelona, Spain (literal)

Titolo

Vacuum Breaker for High DC Current: Experimental Performances and Operational Limits (literal)

Abstract

This paper presents a new method to assess the performances of vacuum circuit breakers (VCBs) for high DC based on the measurement of the energy dissipated in the contacts before the opening of the breaker. This energy is given by the product of the closed-contact resistance times the specific energy (I 2 t) flowing through the breaker. The results of an extensive experimental campaign on VCB prototypes, customized for special applications in the field of thermonuclear fusion, are reported in this paper, showing that, whenever the energy dissipated before the opening exceeds a threshold, the probability of VCB restrike increases. It is also demonstrated that vacuum tubes need initial training at low current prior to the operation at full performance. (literal)

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