Safety device and method for an electric installation
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United States of America Patent
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Dec 26, 2017
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app pub date -
Sep 15, 2014
filing date -
Sep 16, 2013
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Abstract
A safety device capable of being connected between a circuit breaker device and an electric installation powered by an electric grid providing three-phase current having a first associated frequency, using a line for conveying electric current including three phase conductors, a neutral conductor and a protection conductor. The safety device makes it possible to verify at least one electric safety condition following a cut off of electric power of the electric installation by the circuit breaker device. The safety device comprises circuitry or a processor configured to verify presence of a residual voltage above a predetermined safety threshold on at least one of the conductors, and verify isolation between a tested pair of conductors, among the phase conductors. The safety device can be used to perform an associated safety verification method.
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