Our Transformer Monitor: Tried and Tested, Stable and Future-Proof
REG-D®
Transformer Monitor and Voltage Regulator
REG-D®
The REG-D® voltage regulator allows both very simple and highly complex measurement, control, and regulation tasks for tapped transformers. The REG-D® can also be used as a transformer monitor as per IEC 60354 or IEC 60076, as a transducer, recorder, statistical unit, and ParaGramer.
Further questions or want to start an enquiry? Please click “Product Enquiry”.
Cross-Product Downloads
Cross-Product Downloads
Special Publications
Calculating Tools
Product Overview A. Eberle
A. Eberle Seminars in Nuremberg
REG-D®
REG-D®
Instruction Manual
Product and Safety Instructions
Virtual Instruction Manual
Instruction Manual TMM
Technical Data Sheets
Firmware
Change Log
Firmware
Short Instruction Manual
Unique Flexibility
Through our many years of experience in the industry, we know that every customer and every project has specific requirements. Accordingly, we have developed the transformer monitor REG-D® in such a way that it can respond very flexibly to these requirements, which is unique in this form. For example, the REG-D® offers a flexibly expandable number of inputs and outputs, a wide range of applications through software features, and free programmability.
19" Plug Technology As a Tried-and-Tested Model
The design of the transformer monitor REG-D® allows the installation in 19" subracks, wall-mounted and panel-mounted housings. Easy and simple replacement of the devices, customized housings, as well as wiring are made possible by the 19'' plug-in technology of the REG-D®. In addition, the configuration possibilities are inexhaustible, together with other products from A. Eberle, but also with devices from other manufacturers.
The Right Control Protocol for Every Application
The communication interfaces of the transformer monitor REGSys® have the possibility of role-based user administration (RBAC) incl. authentication via RADIUS.
REGSys® can communicate with a central control system via various protocols.
The following protocols are available:
- IEC 60870-5-101/103/104
- IEC 61850 (Server, Client, GOOSE, 9-2 Sampled values)
- DNP 3.0 via Ethernet
- DNP 3.0
- Profibus DP
- MODBUS RTU
- SPABUS
- LON (on request)
All Necessary Functions in a Single Device
The functional scope of our transformer monitor is unique. The control of 3-winding transformers, of phase-shifting transformers, of transformer banks and of compensation reactors as well as transformer monitoring is all possible with only one device and one firmware.
Parallel Operation With up to 15 Transformers
The REG-D® allows parallel operation of up to 15 transformers. The parallel program Master-Follower as well as various programs for circuit reactive current minimization (with and without communication between the controllers) are available. The ParaGramer serves as an aid for the automatic recognition of parallel circuits and for the visualization of the switching states. The ParaGramer maps the switching situation of the individual transformers in single-phase representation and enables automatic detection of parallel operation by evaluating the switch positions.
AETooblox
The Perfect Supplement to the REG-D®
The AEToolbox works on a project basis and impresses with its range of functions and the versatility that the program offers. Using the software, the parameters of connected products can be adjusted and administered, and the continuously recorded data (logbook entries and recorder data) downloaded, visualised and saved.
Auxiliary Components
Accessories for Our Voltage Regulators
News From the Productgroup
REGSys® - News
Webinar
»Cyber Security« Webinar: A Challenge for European Energy Companies
3. December 2025
Webinar recording from 2025-11-26: »Cyber Security« - A Challenge for European Energy Companies[...]
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Blogpost
A. Eberle at the Schwabach City Run 2025
24. November 2025
A. Eberle was represented by 37 participants at the 2025 Schwabach City Run, setting a new internal record for participation. Particularly noteworthy is Benjamin Rentsch's first place in the M 35 40 age[...]
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Blogpost
A. Eberle welcomes Amarillo as a new REGSys® partner in Mexico
20. October 2025
A. Eberle is expanding its international partner network and is pleased to welcome »Amarillo Naranja S.A. de C.V.« as a new »REGSys®«-partner in Mexico.[...]
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General Knowledge
Power in Multiphase Systems
7. August 2025
This technical report highlights the special features of power transmission in three-phase systems and offers valuable insights into the optimisation and analysis of modern power grids.[...]
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Blogpost
Visit From the Rudolf Diesel Technical School at A. Eberle
15. July 2025
We were happy to welcome you, Rudolf-Diesel-Fachschule! Yesterday, we had the pleasure of welcoming two classes of future electrical engineering technicians from the Rudolf-Diesel-Fachschule Nürnberg[...]
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Blogpost
TOP 100 Awards 2025: Innovation for the Energy Future
15. July 2025
💡 As part of the TOP 100 Awards 2025, we were honored to receive a special recognition last week in Mainz – personally presented by TV host and science journalist Ranga Yogeshwar.[...]
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Blogpost
University Excursion: Pentecost Excursion of the Friedrich-Alexander-University Erlangen-Nuremberg (FAU)
14. July 2025
As a company dedicated to innovation, education, and the energy transition, we are pleased to have once again supported the Whitsun excursion of Friedrich-Alexander University Erlangen-Nuremberg (FAU)[...]
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Blogpost
Further Growth at A. Eberle
14. July 2025
Welcome to the team! We welcome our new colleagues at A. Eberle.[...]
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General Knowledge
Voltage Stabilisation
7. July 2025
In this article, you will learn why voltage stabilisation in high, medium and low-voltage grids plays a central role in safe and efficient grid operation. You will learn the basics of ‘voltage stabilisation’[...]
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Training Video
»REGSys®« Training Video 8: Overview SCL-Config for IEC 61850
28. January 2025
In this video you will learn how you can export a CID file, how to adjust the IED name and working with the SCL-Config.[...]
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Training Video
»REGSys®« Training Video 7: How to Use the Winconfig Software
28. January 2025
In this video you will learn how to create a new parameter file, how to upload setting files or download setting files from the Scada card and what kind of parameters a setting file contains.[...]
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Training Video
»REGSys®« Training Video 6: Firmware Update via Winconfig
28. January 2025
In this video you will learn when it is reasonable to use the WinConfig for a firmware update and how to do a firmware update with the WinConfig.[...]
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Training Video
»REGSys®« Training Video 5: Firmware Update via RPL2
28. January 2025
In this video you will learn how to create a physical connection before the firmware update, how to use the RPL2 software and how to do a small test after the firmware update.[...]
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Training Video
»REGSys®« Training Video 4: Changing the Default Password
28. January 2025
In this video you will learn how to connect the SCADA card to your computer, start the software WinConfig and change the default password and define a new one.[...]
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Training Video
»REGSys®« Training Video 3: Changing IP Address via Winconfig
28. January 2025
In this video you will learn how to define a new IP address, how to interpret the “States of detected boards” and how to determine the port numbers of the physical ports. [...]
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Training Video
»REGSys®« Training Video 2: Changing IP-Address via Webserver
28. January 2025
In this video you will learn how to access the web server, how to change the network settings in the web server.[...]
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Training Video
»REGSys®« Training Video 1: Adjusting the Time Synchronisation
24. January 2025
In this video you will learn how to connect the SCADA card to your computer, start the software WinConfig and change the default password and define a new one.[...]
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General Knowledge
Measuring the Voltage Drop
23. January 2025
The voltage drop is the difference between the voltage at the beginning and end of an electrical line. In an electrical network, the voltage can be reduced by the resistance and impedance of the lines,[...]
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Product innovation
Product Discontinuation: WinREG® Version 4.2 R11, as of 31.12.2024
8. January 2025
The product WinREG® Version 4.2 R11 can no longer be ordered as of 31.12.2024.[...]
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Blogpost
International Partner Week 2024 - a Look Back
29. August 2024
Our International Partner Week 2024 - many old friends and new faces were our guests, it was a pleasure.[...]
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