3-phase voltage monitoring relay with RS-485 interface（160…690V AC）, with overvoltage, undervoltage, window monitoring as well as phase sequence, phase loss failure, asymmetry (adjustable asymmetry) monitoring functions. 24…240VAC/DC wide range power supply, with adjustable threshold values and response delay. Supports failure record storage. Supports NFC communication and Modbus/RTU communication, with two configuration possibilities. 1 PDT dry contact output, plug-in connection.

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