SLD-440-ALE产品概述
The SLD Series is designed to protect 3-phase equipment against phase unbalance, phase loss, undervoltage and phase reversal conditions.
With normal operating voltage present on all three phases in the proper phase sequence, the internal relay will energize (pick-up). When an incorrect phase sequence or phase loss occurs or the three-phase line voltages fall outside the preset unbalance or under voltage settings, the internal relay will de-energize (drop-out). When all conditions return to normal, the relay will reset.
The Adjustable Release Delay is provided to ignore momentary voltage fluctuations that cause nuisance tripping.
Both Delta and Wye systems may be monitored. In Wye Systems, connections to neutral are not required.
Datasheet
