RM22TU23 Mains monitoring for phase sequence, failure and undervoltage

Harmony Control. This mains monitoring relay monitors three-phase networks (380 - 480 V AC) for phase sequence, phase failure and undervoltage. Two relay changeovers with a load capacity of up to 8 A are provided for signalling. The limit value (-20 - -2%) can be set for the undervoltage. The settings are made via the control elements on the front, which can be protected against modifications under a transparent cover. With an illuminated scale arrow, adjustment of the potentiometers can be seen very clearly even from a distance. The diagnostic switch on the front enables the output relays to be interrupted for testing the overall application. The diagnostic switch is automatically reset when the transparent cover is closed. Three LEDs indicate the status. The overall width is 22.5 mm, and mounting is on the DIN rail. The cable is connected via screw terminals.