Harmony Control. This mains monitoring relay monitors three-phase networks (380 - 480 V AC) for phase sequence, phase failure and phase asymmetry (5 - 15%). Two relay changeovers with a load capacity of up to 8 A are provided for signalling. For asymmetry, the limit value is set and for the output, a switch-off delay can be set. 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 supply is from the measuring circuit. The cable is connected via screw terminals. https://elecena.pl/product/26768964/rm22ta33-mains-monitoring-for-phase-sequence-phase-failure-and-asymmetry 2024-08-14 https://elecena.pl/product/26768964/rm22ta33-mains-monitoring-for-phase-sequence-phase-failure-and-asymmetry 2025-01-30