Schneider Electric Phase Sequence Relay RM22TA31

Manufacturer: Schneider Electric
Designation: Phase Sequence Relay
Type: RM22TA31
Electrical connection type: Screw connection
With removable terminals: no
Rated control supply voltage Us at AC 50 Hz: 200-240 V
Rated control supply voltage Us at AC 60 Hz: 200-240 V
Voltage type for actuation: AC
Phase sequence monitoring function: yes
Phase failure detection function: yes
Under-voltage detection function: no
Over-voltage detection function: no
Asymmetry detection function: yes
Voltage measurement range: 160-288 V
Min. adjustable response delay time: 0 s
Max. permissible response delay time: 0 s
Min. adjustable fallback delay time: 0.1 s
Max. permissible fallback delay time: 30 s
Number of contacts as normally open: 2
Number of contacts as changeover: 2
Width: 22.5 mm
Height: 90 mm
Depth: 73 mm

The network monitoring relay supervises three-phase networks (200-240 VAC) for phase sequence, phase failure, and phase asymmetry (5-15%). It features two relay changeover contacts that can handle up to 8 A. The asymmetry threshold and a shutdown delay for the output are adjustable. Settings are made via control elements on the front, which can be protected against changes under a transparent cover. A illuminated scale pointer allows for clear visibility of the potentiometer settings even from a distance. The front diagnostic switch enables the deactivation of the output relays for testing the overall application. Closing the transparent cover automatically resets the diagnostic switch. Three LEDs indicate the status. The width of the device is 22.5 mm, and it is mounted on a DIN rail. Power supply is derived from the measurement circuit. The wiring connection is made via screw terminals.