Schneider Electric RM17TG00 Phase Control Relay

The Schneider Electric RM17TG00 Zelio Control Phase Monitoring Relay is a 3‑phase voltage monitor with a Form C (1CO) output rated for 5 A, designed to detect phase loss and incorrect phase sequencing in 3‑phase power networks to protect connected equipment from imbalance‑related damage. It monitors three‑phase voltages across a range of 183–528 VAC (typical 208–480 VAC service), suitable for common 230 V three‑phase systems, with the output signaling state changes that can drive alarms, interlocks, or indicators. The RM17TG00 uses screw terminals for wiring and is intended for DIN‑rail mounting in control panels, and it is part of Schneider Electric’s Zelio Control family within the Harmony line of relays. Typical applications include monitoring motors, pumps, and conveyors in industrial automation to provide early warning or interlock control when a phase is lost or the sequence is out of order.