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Comportement d'un arc électrique impulsionnel de forte intensité : cas du disjoncteur modulaire

Abstract : The modular circuit breaker protects low-voltage lectrice installations against short-circuit faults.The electric arc generated in the arc chamber of the circuit breaker upon opening of the circuit is divided into several arcs in an assembly of multiple metallic plates, in order to limit the current and isolate the fault.The work set out in this paper focuses on the short-circuit current limitation phase. A model arc chamber represents in a simplified way the environment of the electric arc during this phase. The arc is initiated by a high-voltage pulse between two fixed metal plates, the current wave is transient and of high intensity.The relevance of the experimental setup is validated by comparison of the phenomena that it allows to observe with those encountered in the circuit breaker. Particular attention is paid to the arc voltage, which is a determining feature for the performance of the limitation. The influence of the material of the electrodes is studied, distinguishing the substrate from a possible coating.
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Submitted on : Wednesday, July 4, 2018 - 1:01:13 AM
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  • HAL Id : tel-01829287, version 1

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Gauthier Déplaude. Comportement d'un arc électrique impulsionnel de forte intensité : cas du disjoncteur modulaire. Plasmas. Université Paris Saclay (COmUE), 2017. Français. ⟨NNT : 2017SACLS188⟩. ⟨tel-01829287⟩

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