ABB 1SVR560730R3403 CM-UFD.M34 multifunctional grid feeding monitoring relay with three changeover contacts, 0 to 540 V AC phase-to-phase monitoring and DEWA DRRG interface protection.
The ABB 1SVR560730R3403, also known as the CM-UFD.M34, is a multifunctional grid feeding monitoring relay designed to provide interface protection between renewable energy generation systems and the public electricity grid. It continuously monitors critical electrical parameters and initiates disconnection when grid conditions move outside permitted limits.
Developed in accordance with the DEWA Distributed Renewable Resources Generation standard, the CM-UFD.M34 monitors phase-to-phase and phase-to-neutral voltages, grid frequency and other network conditions. Its programmable monitoring functions help protect grid stability while supporting the safe connection of photovoltaic, wind and distributed generation installations.
The relay offers a phase-to-phase measuring range of 0–540 V AC and a phase-to-neutral measuring range of 0–312 V AC. Three changeover output contacts allow the relay to control external decoupling devices such as contactors, switch-disconnectors or circuit breakers when an abnormal grid condition is detected.
Grid feeding monitoring relays supervise the quality and stability of the public electricity network at the point where a renewable energy system is connected. The ABB CM-UFD.M34 measures voltage and frequency continuously and compares the readings with configured protection thresholds.
When an unacceptable condition is detected, the relay changes the state of its output contacts and signals an external decoupling device to disconnect the generating system from the grid. Once stable network conditions have been restored and the configured reconnection requirements are satisfied, the installation can be safely reconnected.
| Voltage | 540 V |
|---|---|
| Manufacturer | ABB |
| Series | CM-UFD |
| Model | CM-UFD.M34 |
| Product ID | 1SVR560730R3403 |
| Product type | Grid feeding monitoring relay |
| Application standard | DEWA DRRG |
| Phase-to-phase measuring range | 0–540 V AC |
| Phase-to-neutral measuring range | 0–312 V AC |
| Output contacts | 3 changeover contacts |
| Monitoring functions | Overvoltage, undervoltage, overfrequency and underfrequency |
| Additional monitoring | Interrupted neutral, ten-minute average voltage, vector shift and ROCOF |
| Mounting type | DIN rail mounting |
| Product width | 108 mm |
| Product height | 90 mm |
| Product depth | 67 mm |
| Net weight | approx. 0.304 kg |
| EAN | 4013614511110 |
| Customs tariff number | 85364900 |
| HS Code | 85364900 |
The ABB 1SVR560730R3403 monitors the voltage, frequency and stability of a public electricity grid and provides interface protection for connected renewable energy generation systems.
The ABB model name is CM-UFD.M34, and its product identification number is 1SVR560730R3403.
The relay monitors phase-to-phase voltages from 0 to 540 V AC and phase-to-neutral voltages from 0 to 312 V AC.
It monitors overvoltage, undervoltage, overfrequency, underfrequency, interrupted neutral conditions, ten-minute average voltage, vector shift and rate of change of frequency.
The relay uses its output contacts to signal an external decoupling device, such as a contactor, switch-disconnector or circuit breaker, when abnormal grid conditions are detected.
ABB grid feeding monitoring relays provide dependable interface protection for renewable energy systems, helping installers and electrical engineers maintain network stability and meet grid connection requirements.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...