| Description de l'article | DRR20, phase sequence relay with monitoring of voltage and asymmetry, 3 AC 400 V / phase sequence relay with automatic changing of sequence connection of 2 external contactors integrated monitoring of asymmetry, adjustable 5...25 % integrated monitoring of undervoltage adjustable 70...95 % alarm delay adjustable 0, 1...10 s measuring voltage = supply voltage =3 AC 400 V display of operating status with leds width 22, 5 MM, snap-on mounting on DIN-rail or with screws (option) |