This guide details the application of Schneider Electric Harmony Control Relays (RM17, RM22, RM35, RMNF22TB30) for monitoring and protecting three-phase and…
The Harmony Control Relay is designed to monitor and detect abnormal operating conditions in electrical systems, including phase loss, incorrect phase sequence, asymmetry, overvoltage, undervoltage, overfrequency, and underfrequency. These issues can cause motor failure and equipment downtime, making the relay a critical component for protection.
| Dimensions (Width) | 17.5 mm, 22.5 mm, 35 mm |
|---|---|
| Supply Voltage Range | 208…480 VAC |
| Number of Contacts | 1 or 2 C/O or 2 N/O |
| Current Rating | 5 A or 8 A |
| Protection Rating | IP50 |
The diagnostic button closes the downstream circuit immediately without sending a fault input signal to the relays to shorten testing time.
The dimension of the RM17 Control Relay is 17.5 mm.
The current rating for the RM22 Control Relay is 8 A.
The voltage range supported is 208…480 VAC.