As long as the monitored voltage remains between the Over Voltage and Under Voltage settings, the internal relay stays energized. If the monitored voltage falls outside this range, the relay will drop-out. The dial sets the upper trip setting per the Over voltage range of the product. The dial sets the lower trip setting at 30-95% of the upper setting. This product has an adjustable time delay on relay drop-out of 0.1-10 seconds to prevent nuisance tripping.
