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ATC Diversified Electronics CBA-120-ALE-40 current monitor is part of the CBA series family. It is designed to detect under and over current conditions. When the monitored current is within the normal current band, both internal relays are de-energized (or drop out). When the current rises above the over current setting for longer than 1.0 second, the over current relay energizes (or pick-up). The over and under current trip points are independently adjustable and an external CT may be used to extend the range of the current monitor if needed.