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ATC Diversified Electronics CDD-120-ALE-20 current monitor is part of the CDD series family.  It is designed to be used as an over current monitor or an under current monitor.  The CDD series has adjustable delay-on operate and adjustable delay-on relay.  When used as an over current monitor the delay-on operate time delay is used to override inrush periods.  When the CDD series is used as an under current monitor, the delay on release timer is used to override a temporary under current condition.