Victron Anti-islanding relay - Ziehl Voltage and Frequency Relay UFR1001E
True RMS monitoring, 24-270V AC/DC supply, 6 TE DIN rail, 90x105x69mm
Contactor 500A Coil 48-72VDC with auxiliary con...DESCRIPTION
Ziehl UFR1001E Voltage and Frequency Relay for Grid-Connected Generation Systems
Reliable Anti-Islanding Protection for Solar PV and Distributed Energy Resources
The Ziehl UFR1001E is a precision voltage and frequency relay engineered to deliver anti-islanding protection for grid-connected generation systems. It continuously monitors voltage and frequency at the point of common coupling, ensuring immediate disconnection when grid parameters fall outside prescribed limits. This is essential for compliance with VDE-AR-N 4105:2018-11, VDE-AR-N 4110:2018-11, G98, G99, and ÖVE/ÖNORM E 8001-4-712:2009, making it a trusted component in solar PV installations, cogeneration plants, and other distributed energy resources across Australia and Europe.
Unlike generic monitoring relays, the UFR1001E uses true RMS measurement for accurate detection of over/under voltage, over/under frequency, vector shift, and rate of change of frequency (ROCOF). Its passive anti-islanding detection (per chapter 6.5.3 and appendix D2) reduces the risk of unintentional islanding, protecting both utility personnel and equipment from back-feed hazards. The wide auxiliary supply range of AC/DC 24-270V simplifies integration into diverse control circuits, while the two change-over relay contacts provide flexible interfacing with contactors or circuit breakers.
Key Features
- Comprehensive grid monitoring – voltage, frequency, vector shift, and ROCOF in one device
- True RMS measurement for high accuracy even with distorted waveforms
- Wide auxiliary supply – AC/DC 24-270V for versatile installation
- Adjustable setpoints and time delays to match local utility requirements
- Clear LCD display and LED indicators for real-time status and diagnostics
- Compact 6 TE DIN rail housing (90 x 105 x 69 mm) for space-efficient panel mounting
- IP30 / IP20 protection suitable for indoor control cabinets
Engineered for Compliance and Safety
Meeting stringent grid connection standards is non-negotiable for solar installers and system integrators. The UFR1001E is pre-certified to VDE-AR-N 4105 and G99, eliminating guesswork and reducing commissioning time. Its vector shift detection (<50 ms response) and ROCOF monitoring provide fast, reliable loss of mains detection, a critical requirement for embedded generation up to and beyond 30 kW. The adjustable hysteresis and switching delays allow fine-tuning to avoid nuisance tripping while maintaining grid stability.
For larger or three-phase systems, the UFR1001E can be paired with external contactors and a main circuit breaker. We also offer a pre-assembled Anti-Islanding Box 63A (single and three phase) that includes this relay, two in-line 63A contactors, and a main breaker—ready for immediate deployment.
Applications
- Solar PV systems – residential, commercial, and industrial grid-tied inverters
- Battery energy storage systems with grid export capability
- Cogeneration (CHP) plants and backup generators operating in parallel with the grid
- Wind and hydro turbines requiring grid synchronisation and protection
- EV charging infrastructure with vehicle-to-grid (V2G) functionality
Why Choose the Ziehl UFR1001E?
Selecting a certified anti-islanding relay reduces project risk by ensuring regulatory compliance from day one. The UFR1001E’s robust design and wide operating temperature range (-20°C to +55°C) make it suitable for Australian conditions, from coastal installations to inland heat. Its DIN rail mounting and clear terminal labelling speed up installation, while the digital display simplifies commissioning and fault finding.
With proven reliability in thousands of installations worldwide, the UFR1001E is a future-proof choice for grid-connected generation. Download the datasheet and certificates below for full technical details, or visit www.ziehl.de for additional documentation.
Add the Ziehl UFR1001E to your project today and ensure your grid-tied system meets the latest anti-islanding protection requirements with confidence.
SKU: VIC-REL100100000
SPECIFICATIONS
Specifications
| Voltage And Frequency Relay Type | UFR1001E |
|---|---|
| Part Number | S222296 |
| Complies With | VDE-AR-N 4105:2018-11, VDE-AR-N 4110:2018-11, G98, G99, ÖVE/ÖNORM E 8001-4-712:2009 and other standards for generators connected to the public grid |
| Rated Supply Voltage Us | AC/DC 24-270 V, 0/45...65 Hz, < 5 VA; DC: 20.4...297 V, AC: 20.4...297 V |
| Relay Output | 2 change-over contacts; see operating manual |
| Measurement Phase-Phase | AC 15...530 V (< 5 V display: 0) |
| Setting Range Phase-Phase | AC 15...520 V |
| Measuring Voltage Phase-Neutral | AC 10...310 V (< 5 V display: 0) |
| Setting Range Phase-Neutral | AC 15...300 V |
| Measurement Method | True RMS |
| Voltage Hysteresis | Adjustable 1.0...180 V |
| Voltage Measurement Accuracy | With neutral: ±0.6% of measured value; without neutral: ±0.8% of measured value |
| Frequency Measurement Range | 40...70 Hz |
| Frequency Setting Range | 45.00...65.00 Hz |
| Frequency Hysteresis | 0.05...10.00 Hz |
| Frequency Measurement Accuracy | ± 0.04 Hz ± 1 digit |
| Vector-Shift Setting Range | 2.0...65.0° |
| ROCOF (df/dt) Setting Range | 0.100...5.000 Hz/s, 4...50 cycles |
| Voltage Switching-Delay (dAL) | Adjustable 0.05 (± 15 ms)...300.0 s |
| Voltage Switching-Back-Delay (doF) | Adjustable 0 (approx. 200 ms)...6.000 s |
| Frequency Switching-Delay (dAL) | Adjustable 0.05 (± 15 ms)...300.0 s |
| Frequency Switching-Back-Delay (doF) | Adjustable 0 (>200 ms)...6.000 s |
| Vector-Shift Switching-Delay (dAL) | < 50 ms |
| Vector-Shift Switching-Back-Delay (doF) | Adjustable 3...240 s |
| Delay At Us On | Adjustable 2...20 s |
| Passive Anti-Islanding Protection | Acc. to ch. 6.5.3 and app. D2 |
| Operating Temperature | -20 °C...+55 °C |
| Storage Temperature | -25 °C...+70 °C |
| Design / Installation Frame | V6 / Front mounting kit type ER6, 6 TE |
| Dimensions (H x W x D) | 90 x 105 x 69 mm, mounting height 66 mm |
| Protection Housing | IP30 |
| Protection Terminals | IP20 |
| Attachment | DIN-rail 35 mm according to EN 60 715 or screws M4 |
| Weight | Approx. 250 g |
| SKU: | VIC-REL100100000 |
| Barcode: | 8719076024408 |
| Model #: | REL100100000 |
| MPN: | REL100100000 |
WARRANTY
Victron Energy Limited Warranty Policy
Victron Energy warrants its products to be free from defects in workmanship and materials for a period of 5 years from the date of purchase by the end user, with a maximum of 66 months from the Victron Energy invoice date. Exceptions on this are: lead acid batteries; 2 years from date of purchase by the end user, with a maximum of 30 months from the Victron Energy invoice date, Lithium-ion batteries; 3 years from date of purchase by the end user. In addition to this proof of correct battery usage is required when making a battery warranty claim.
During this period, Victron Energy will, at its option, repair or replace the defective product free of charge. The warranty does not include performing or reimbursing de‐installation, transportation and re‐installation. This warranty will be considered void if the unit has suffered any physical damage or alteration, either internally or externally, and does not cover damages arising from improper use like: • Reverse of battery polarity. • Inadequate connection. • Mechanical shock or deformation. • Contact with liquid or oxidation by condensation. • Use in inappropriate environment (dust, corrosive vapor, humidity, high temperature, biological infestation...). • Breakage or damage due to lightning. • Connection terminals and screws destroyed or other damages, like overheat, due to insufficient tightening. • For any electronical breakage except due to lightning (reverse polarity, over‐voltage due to external cause), the state ofthe internal control diode and of the inputs/output X and Y capacitors determine the warranty.
This warranty will not apply where the product has been misused, neglected, improperly installed, or repaired by anyone else than Victron Energy or one of its authorized Qualified Service Partners. In order to qualify for the warranty, the product must not be disassembled or modified.
Repair or replacement are our sole remedies and Victron Energy shall not be liable for damages, whether direct, incidental,special, or consequential, even caused by negligence or fault.
Victron Energy owns all parts removed from repaired products. Victron Energy uses new or reconditioned parts made by various manufacturers in performing warranty repairs and building replacement products. If Victron Energy repairs or replaces a part of a product, its warranty term is not extended. In case of replacement the new component has a warranty of 6 months, without effect on the initial warranty period. All remedies and the measure for damages are limited to the above. Victron Energy shall in no event be liable for consequential, incidental, contingent orspecial damages, even if having been advised of the probability of such damages. Any and all other warranties expressed or implied arising by law, course of dealing, course of performance, usage of trade or otherwise, including but not limited to implied warranties of merchantability and fitness for a particular purpose, are limited in duration to a period of two (2) years from the date of purchase.
Life Support Policy As a general policy, Victron Energy, does not recommend the use of any of its products in life support applications where failure or malfunction of the Victron Energy's product can be reasonably expected to cause failure of the life support device or to significantly affect its safety or effectiveness. Victron Energy does not recommend the use of any of its products in direct patient care. Victron Energy will not knowingly sell its products for use in such applications unless it receives in writing assurances satisfactory to Victron Energy that the risks of injury or damage have been minimized, the customer assumes all such risks, and the Liability of Victron Energy is adequately protected under the circumstances.
As a product requires service, it must be brought back to the place of purchase. In case no contact can be taken with the merchant, or if he is either unable or not allowed to provide service, direct contact should be taken with Victron Energy.
Warranty on Repairs The warranty period on products or on printed circuits boards repaired by Victron Energy as well as on printed circuit boards for replacement is 6 months from delivery by Victron Energy.
Transport It is the responsibility of the sender to sufficiently package these products. The transport must be organized in a way to avoid any damage, especially when a single unit or heavy unit is sent.
Severability If a part of the terms and conditions set out above is held invalid, void or unenforceable due to any particular national or international legislation, it shall not affect other parts of the terms and conditions remaining.
For Australia only Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
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