Schneider Electric RM17TG00 Phase Control Relay

Schneider Electric RM17TG00 is a Harmony Control Relays modular 3-phase supply control relay rated for 5 A with a single changeover contact (1 CO) and screw terminal connections, designed to monitor three-phase power in 208–480 V AC networks. It provides phase-sequence control and total loss of phase detection, wiring to monitor L1, L2, and L3 and delivering a closed output relay when the phase sequence and voltages are correct; a yellow LED indicates healthy operation, and the output remains open if a sequencing fault or loss of phase is detected. This device is intended for industrial automation to ensure motors and other three-phase loads only start when the supply is valid, and its modular format allows stacking with other Harmony RM modules in control panels while the screw-terminal wiring simplifies installation. With a 5 A output rating, the RM17TG00 offers a straightforward, reliable means to monitor and gate three-phase power for applications such as motor control, phase monitoring, and automated line protection in HVAC, manufacturing, and packaging environments.