The document describes the advance features of a No-Volt Relay (NVR) product from Lobel Solar System. The NVR provides protections from over voltage, under voltage, single phasing, and phase reversal. It monitors the voltage of each phase (R-Y-B) and displays the phase indication, output status, voltage readings of each phase cyclically, and any fault conditions. Additional features include a 10 second system on delay to check input voltage health before powering on, and automatically disconnecting the inverter if utility power is lost. The NVR has an R-Y-B phase input, neutral, and provides a 230V AC output to power a contactor coil.
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