Description
The EVR-3P44 is an electronic voltage protection relay from Schneider Electric’s EOCR (Samwha) range, designed to safeguard 3-phase electrical systems and motors from voltage-related faults. It continuously monitors the supply for overvoltage, undervoltage, phase loss, phase reversal, and phase imbalance, tripping its output contacts the moment a fault condition is detected to protect connected equipment from damage.
Rated across a wide operating range of 200–440V AC (covering common voltages of 200, 220, 380, 400, 415, and 440V), the relay offers selectable overvoltage thresholds (5–25%) and undervoltage thresholds (−5% to −30%), plus adjustable phase imbalance sensitivity (5%, 10%, 15%) — all switchable OFF if not needed for a given application. A selectable time delay (0.2–10 seconds) before tripping helps avoid nuisance trips from brief voltage transients, and the reset mode can be configured as manual, electrical, or automatic (with a 5-second auto-reset option). Two LEDs (green PWR, orange TRIP) give a clear at-a-glance status indication. With a compact footprint (62 × 89.5 × 75mm), DIN-rail or screw mounting, and CUL, CE, CCC, and RoHS certifications, the EVR-3P44 is well suited for protecting motors, pumps, and general 3-phase equipment in industrial, commercial, and marine control panels.