Phase sequence monitoring for a three-phase system Mains frequency: 50 Hz, 60 Hz, and 400 Hz (40 Hz–500 Hz)
Status LEDs – Normal, reverse, and missing phase
DOP23: Phase sequence OK, phase presence OK
DOP23L: Phase presence OK
The DOP23 relay enables phase sequence control for three-phase electrical systems that can be moved (
) and where the direction of rotation is critical (e.g., pumps, saws, and drills). A contact indicating the correct phase se
e and the presence of all phases is available to authorize system startup. LEDs on the front panel facilitate diagnostics (normal, reverse, or missing phase).