electronic monitoring relays for three-phase voltages with adjustable percentage and drive delay EMD-FL-3V-500 function: under voltage, asymmetrical window, phase sequence, down phases, input range 3 ... 500V, setting range -30 ... 20%, relay output contact Version: 2 reversible dried, mounted switched power lines 750 VA (3 a / 250 VAC), power switching free: 1250 VA (5 a / 250 VAC), degree of protection: IP40 (housing) / IP20 (connection terminal), ambient temperature range -25 ... 55 ° C, contact Phoenix.