AC Under Current Monitor

The CMU Series is used to detect UNDER CURRENT conditions. Theinternal relay is energized Pick-up when the monitored current isabove the preset trip point. The relay de-energizes Drop-out whenthe current falls below the trip point for longer than the adjustabledelay. The delay is incorporated to prevent nuisance tripping caused bymomentary line dips. The relay re-energizes when the current rises 5%above the Drop-out trip point for longer than 0.1 seconds. The relay hasthe automatic reset feature.An external CT may be used to extend the range of the Current Monitor.