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Switchgear electrical switchgear leakage test electronic weighing device

US7009825B2 - Earth leakage protection device and ... earth leakage protection device comprises an input designed to be connected to a measuring toroid, a comparator to compare a signal representative of an earth leakage current with a reference threshold, and a processing circuit to command a trip relay for opening main contacts when an earth leakage fault is detected. The device also comprises a signal rectifier receiving at least one ...

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