Main Features

Device Type: Multifunctional grid feed monitoring relay designed to manage safe connection/disconnection of renewable energy systems to public grid
Power Supply: – V AC/DC, suitable for various installation types
Measurement Range:
- Phase-to-phase voltage: – VAC
- Phase-to-neutral voltage: – VAC
Monitoring Functions:
- Over/undervoltage
- Over/underfrequency
- Rate of change of frequency (ROCOF)
- Vector shift detection
- Neutral interruption protection
Outputs: change‑over (SPDT) relay contacts for controlling breakers or disconnectors
Communication: Serial Modbus RTU for remote setup, monitoring and integration with ABB Ability and SCADA systems
Standards Compliance:
- VDE‑AR‑N / / certified (Germany)
- TÜV‑tested for grid stability applications
Interface: Backlit LCD with intuitive menu and navigation buttons for onsite configuration and diagnostics
Form Factor: Compact DIN‑rail ( ×  ×  mm) with screw terminal connections

ABB – SVRR (CM‑UFD.MM) – Grid‑Feeding Monitoring Relay with Modbus