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2003•Unpublished venueRequires access

Short-line fault interruption capability of vacuum circuit breakers

R.P.P. Smeets, Wouter A. van der Linden

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Abstract

Current zero measurements are performed during short-line fault interruption tests of vacuum circuit breakers. Various reignition modes (occurring between 0 and 75 ms after current zero) were observed due to insufficient arcing time. The (single) restrike and the (single) failure occurred with higher current than rated. The relationship between post-arc current/charge, reignition mode and TRV are discussed in this paper. All interrupters succeeded to interrupt at first or second current zero under the 'rated' conditions of short-line fault current and TRV.

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What this paper is about

Current zero measurements are performed during short-line fault interruption tests of vacuum circuit breakers. Various reignition modes (occurring between 0 and 75 ms after current zero) were observed due to insufficient arcing time. The (single) restrike and the (single) failure occurred with higher current than rated. The relationship between post-arc current/charge, reignition mode and TRV are discussed in this paper. All interrupters succeeded to interrupt at first or second current zero under the 'rated' conditions of short-line fault current and TRV.

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Available abstract

Current zero measurements are performed during short-line fault interruption tests of vacuum circuit breakers. Various reignition modes (occurring between 0 and 75 ms after current zero) were observed due to insufficient arcing time. The (single) restrike and the (single) failure occurred with higher current than rated. The relationship between post-arc current/charge, reignition mode and TRV are discussed in this paper. All interrupters succeeded to interrupt at first or second current zero under the 'rated' conditions of short-line fault current and TRV.

Key concepts: Transient recovery voltage, Circuit breaker, Prospective short circuit current, Current (fluid), Interrupt, Electrical engineering, Fault (geology), Line (geometry)

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