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ABB CM-UFD.M33M G99+coms Grid feeding relay with Modbus
ABB CM-UFD.M33M multifunction grid feeding monitoring relay with Modbus RTU communication, G99 compliant protection functions and comprehensive voltage and frequency monitoring for renewable energy installations.
£935.66
Why Choose the ABB CM-UFD.M33M Grid Feeding Monitoring Relay?
The ABB CM-UFD.M33M is a multifunctional grid feeding monitoring relay designed to provide reliable interface protection between renewable energy generation systems and the public electricity grid. Engineered for photovoltaic systems, wind turbines, battery storage installations and other distributed energy resources, it continuously monitors grid voltage and frequency to ensure safe and compliant operation.
The relay incorporates advanced monitoring functions including overvoltage, undervoltage, overfrequency, underfrequency, ROCOF (Rate of Change of Frequency), vector shift detection and interrupted neutral monitoring. When abnormal grid conditions are detected, the relay signals external switching devices to safely disconnect the generating plant, helping protect equipment and maintain grid stability.
Designed to meet modern renewable energy requirements, the CM-UFD.M33M features a Modbus RTU communication interface, integrated LCD display, configurable protection settings and pre-configured profiles supporting G98/1 and G99/1 grid connection requirements, making it ideal for commercial and industrial renewable energy installations.
Key Advantages
- Advanced grid feeding monitoring relay for renewable energy installations.
- Supports single and three-phase AC systems.
- Integrated Modbus RTU communications.
- Monitors voltage, frequency, ROCOF and vector shift.
- Suitable for G98/1 and G99/1 compliant installations.
- Large backlit LCD display with intuitive configuration.
Key Features
- ABB CM-UFD series grid monitoring relay.
- Model: CM-UFD.M33M.
- Multifunction grid interface protection.
- Modbus RTU communication interface.
- Three changeover relay outputs.
- Voltage increase and decrease protection.
- Frequency increase and decrease monitoring.
- 10-minute average voltage monitoring.
- ROCOF and vector shift detection.
- Interrupted neutral monitoring.
- True RMS measurement technology.
- DIN rail mounting.
Reliable Interface Protection for Renewable Energy Systems
The ABB CM-UFD.M33M continuously supervises the quality and stability of the public electricity network, ensuring renewable energy installations disconnect rapidly whenever voltage or frequency moves outside permitted limits. This protects both grid infrastructure and generating equipment whilst supporting safe reconnection once stable operating conditions return.
Its comprehensive protection functions, communication capability and flexible configuration make the relay suitable for photovoltaic systems, battery energy storage, combined heat and power installations and wind generation projects requiring dependable grid interface protection.
Typical Applications
- Solar photovoltaic installations.
- Battery energy storage systems.
- Wind turbine installations.
- Combined heat and power systems.
- Commercial renewable energy projects.
- Grid connected distributed generation.
Technical Specifications
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| Signal / Input Range | 0–317 V AC | |
|---|---|---|
| Monitoring Function | Frequency | |
| Manufacturer | ABB | |
| Series | CM-UFD | |
| Model | CM-UFD.M33M | |
| Product type | Grid feeding monitoring relay | |
| Communication | Modbus RTU | |
| Monitoring functions | Voltage, frequency, ROCOF, vector shift, interrupted neutral | |
| Voltage measuring range | L-N 0 to 317 V AC | |
| Supported systems | Single-phase and three-phase AC | |
| Output contacts | 3 changeover relays | |
| Display | Backlit multiline LCD | |
| Mounting type | DIN rail | |
| Protection standards | G98/1 and G99/1 presets | |
| Dimensions (H × W × D) | 90 × 108 × 67 mm | |
| Weight | Approx. 0.312 kg |
Frequently Asked Questions
What is the ABB CM-UFD.M33M used for?
It provides grid interface protection by monitoring voltage, frequency and other grid parameters before disconnecting renewable energy systems when abnormal conditions occur.
Does the CM-UFD.M33M support Modbus communication?
Yes. It features an integrated Modbus RTU communication interface for monitoring and integration into energy management systems.
Which renewable energy systems can use this relay?
The relay is suitable for photovoltaic systems, wind turbines, battery storage, CHP systems and other distributed generation installations.
What protection functions are included?
The relay monitors overvoltage, undervoltage, overfrequency, underfrequency, ROCOF, vector shift, interrupted neutral and average voltage conditions.
Does this relay support UK G99 requirements?
Yes. The CM-UFD.M33M includes pre-configured settings supporting G98/1 and G99/1 grid connection requirements.
Trusted by Renewable Energy Professionals Worldwide
ABB CM-UFD grid feeding monitoring relays are trusted by renewable energy installers, panel builders and electrical engineers to provide dependable grid interface protection for distributed generation systems.
