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Siemens Digital Single Phase Voltage Monitoring Relays Siemens 3UG4631 1AW30, This digital relay has a measurable voltage of 0.1 to 60V AC and functions as a voltage monitoring relay for single phase AC and DC voltages against a set threshold for overshoot and undershoot.Typical applications for this device includes protection of plant against destruction due to overvoltage, switch on of plant at a defined voltage and higher, protection against overloaded supply voltages, particularly with battery power, threshold switch for analogue signals from 0.1 to 10 V. Siemens 3UG4631 1AW30 Single Phase Voltage Monitoring Relay Digital SPDT CO
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