The ABB CM-UFD.M (part number SVRR) is a multifunction grid-feeding monitoring relay designed to provide interface protection for renewable energy systems. Installed between local generation and the utility grid, it ensures safe synchronization by monitoring voltage, frequency, Rate-of-Change-of-Frequency (ROCOF), and neutral interruption per CEI – standards.

Key Features:

• Model: CM‑UFD.M, ABB SVRR

• Function: Grid-feeding monitoring relay for interface protection in distributed generation

• Supply Voltage: – V AC/DC

• Measurement Range: – V line-to-line; – V line-to-neutral

• Monitored Parameters:

– Over-/undervoltage (-min average + instantaneous)

– Over-/underfrequency

– Interruptions (neutral line interruption)

– ROCOF (rate of change of frequency)

• Outputs: × changeover (SPDT) contacts rated  A @  V AC

• Mounting: DIN-rail (DIN  mm) with screw terminals; IP enclosure

• Operating Conditions: – °C to + °C; storage – °C to + °C; IP

• Dimensions & Weight: × ×  mm; approx. . kg

• Standards: CEI ‑, EN , IEC ‑, IEC ‑‑/‑‑; RoHS compliant

ABB – CM-UFD.M22 (1SVR560730R3400) – Grid-Feeding Monitoring Relay