Control of 3-phase networks : phase sequence, total phase failure. Featured List: Three-phase network control: phase order, total phase loss. Multi-voltage from 3 x 208 to 3 x 480 Vac. Controls its own voltage supply. Measurement in true RMS. LED status indicator. Type Phase Loss, Phase Sequence Trip Status Energized High Trip Range 183 ~ 484V AC Delay Time No Delay Voltage - Supply 208 ~ 440VAC Output Type Relay Circuit SPDT (1 Form C) x 2 Contact Rating @ Voltage 5A @ 250VAC Mounting Type DIN Rail Operating Temperature -20°C ~ 50°C