ABB CM-UFD.M33 Grid Feeding Monitoring Relay 3CO, 0–550V AC
The ABB CM-UFD.M33 (1SVR560730R3402) is a multifunctional grid feeding monitoring relay for renewable-energy and distributed-generation systems. It provides over/undervoltage, over/underfrequency, 10-minute average voltage, ROCOF, vector shift and interrupted-neutral monitoring, with 0–550V AC line-to-line measurement and 24–240V AC/DC supply.
Description
The ABB CM-UFD.M33 (1SVR560730R3402) is a multifunctional grid feeding monitoring relay designed to provide interface protection between renewable energy generation systems and the public electrical grid. It monitors grid voltage and frequency and can initiate disconnection of the generating installation when abnormal grid conditions are detected.
The CM-UFD.M33 monitoring relay supports single-phase and three-phase AC systems and provides monitoring for overvoltage, undervoltage, overfrequency and underfrequency. It also includes 10-minute average voltage monitoring, interrupted neutral detection, ROCOF (Rate of Change of Frequency) monitoring and vector shift detection for loss-of-mains protection.
The relay has a measuring range of 0–550V AC line-to-line and 0–317V AC line-to-neutral, with a wide 24–240V AC/DC control supply. It provides three changeover contacts (3CO / SPDT) for control and interface applications.
The ABB CM-UFD.M33 features a multiline backlit LCD, true RMS measurement, adjustable threshold values and tripping delays, password protection and an error memory capable of storing up to 99 entries. Three control inputs can be used for functions such as feedback signals and remote trip commands.
The device is particularly suitable for solar PV systems, distributed generation and renewable-energy installations where grid protection and loss-of-mains detection are required. ABB documentation identifies the CM-UFD.M33 as a grid-feeding monitoring relay complying with G99 requirements, while ABB also provides certification documentation for the CM-UFD.M33 family.
| Specification | Details |
|---|---|
| Manufacturer | ABB |
| Product Reference | 1SVR560730R3402 |
| Extended Product Type | CM-UFD.M33 |
| Product Type | Grid Feeding Monitoring Relay |
| Product Range | CM-UFD |
| Application | Grid Interface / Renewable Energy Protection |
| Measuring Range L-L | 0–550V AC |
| Measuring Range L-N | 0–317V AC |
| Rated Control Supply | 24–240V AC/DC |
| Network Type | Single-phase and three-phase AC |
| System Configuration | 2-wire, 3-wire or 4-wire AC systems |
| Frequency Monitoring | Overfrequency and underfrequency |
| Voltage Monitoring | Overvoltage and undervoltage |
| 10-Minute Average Monitoring | Yes |
| Interrupted Neutral Monitoring | Yes |
| ROCOF Monitoring | Yes |
| Vector Shift Detection | Yes |
| Loss-of-Mains Detection | Yes |
| Output Contacts | 3 c/o (SPDT) |
| Control Inputs | 3 |
| Display | Multiline backlit LCD |
| Measurement Principle | True RMS |
| Threshold Settings | Adjustable |
| Tripping Delays | Adjustable |
| Error Memory | Up to 99 entries |
| Password Protection | Yes |
| Terminal Type | Screw terminals |
| Output Circuit UL/CSA | 300V AC |
| Operating Temperature | -20°C to +60°C |
| Storage Temperature | -25°C to +50°C |
| Approx. Product Weight | 0.30kg |
| Standards / Compliance | EN 50178, IEC/EN 60255-27, IEC/EN 61000-6-2, IEC/EN 61000-6-3 |
| Additional Standard | UL 508, CAN/CSA C22.2 No.14 |
| Grid Compliance | ENA EREC G99 |
| Country of Origin | Germany |
| EAN | 4013614492921 |
Key Features
- ABB CM-UFD.M33 multifunctional monitoring relay.
- Grid feeding monitoring for renewable-energy installations.
- Interface protection between generation systems and the public grid.
- 0–550V AC line-to-line measuring range.
- 0–317V AC line-to-neutral measuring range.
- 24–240V AC/DC control supply.
- Overvoltage and undervoltage monitoring.
- Overfrequency and underfrequency monitoring.
- 10-minute average voltage monitoring.
- ROCOF monitoring for loss-of-mains protection.
- Vector shift detection.
- Interrupted neutral detection.
- 3 changeover contacts (3CO/SPDT).
- Three configurable control inputs.
- True RMS measurement.
- Multiline backlit LCD display.
- Adjustable thresholds and trip delays.
- 99-event error memory.
- Password-protected settings.
- Suitable for G99-compliant grid interface protection.
Applications
- Solar PV grid protection
- Renewable energy systems
- Distributed generation
- Grid-connected photovoltaic systems
- Generator interface protection
- Loss-of-mains protection
- Grid voltage monitoring
- Grid frequency monitoring
- ROCOF protection
- Vector shift protection
- Public grid interface monitoring
- Industrial power-generation systems
- Commercial renewable-energy installations
- Electrical distribution systems
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