Schneider Electric Under-voltage Relay RM22TU23

Manufacturer: Schneider Electric
Designation: Under-voltage Relay
Type: RM22TU23
Electrical connection type: Screw connection
With removable terminals: no
Rated control supply voltage Us at AC 50 Hz: 380-480 V
Rated control supply voltage Us at AC 60 Hz: 380-480 V
Voltage type for operation: AC
Phase sequence monitoring function: yes
Phase failure detection function: yes
Under-voltage detection function: yes
Over-voltage detection function: no
Asymmetry detection function: no
Voltage measurement range: 304-576 V
Min. adjustable response delay time: 0 s
Max. permissible response delay time: 0 s
Min. adjustable reset delay time: 0 s
Max. permissible reset delay time: 0 s
Number of contacts as changeover: 2
Width: 22.5 mm
Height: 90 mm
Depth: 73 mm

The Schneider Electric Under-voltage Relay RM22TU23 is a network monitoring relay that monitors three-phase networks (380-480 VAC) for phase sequence, phase failure, and under-voltage. It features two relay changeovers that can handle loads up to 8 A. The under-voltage threshold is adjustable (-20 to -2 %). Settings are made via control elements on the front, which are protected from tampering under a transparent cover. An illuminated scale pointer allows for clear visibility of the potentiometer settings from a distance. The front diagnostic switch enables the disconnection 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. The wiring connection is made via screw terminals.