WEG RPW relays are electronic devices that protect the three-phase systems against phase loss or neuter loss (selectable) (RPW FF), phase sequence inversion (RPW SF) or both functions integrated in the same product (RPW FSF). Whenever an anomaly occurs in the system, the relay will switch its output to interrupt the motor or process to be protected. Designed according to international standards, the RPW is a compact and safe solution in 22.5-mm wide boxes for mounting on DIN rail 35mm.