Products & Services



As a member of the international Aurelius Group, SEG Electronics GmbH develops, manufactures and distributes robust and reliable protection relays, i. e. IEDs (Intelligent Electronic Devices), for Power Generation and Power Distribution applications.

We are protecting the relevant components of electrical energy generation and energy distribution: generators, transformers, motors, cables and overhead lines as well as busbars.

We are experts in interconnecting Distributed Energy Resources (DER) to the public grid. Safety and compliance with the corresponding grid codes and worldwide interconnection standards are essential aspects of our products.

No matter whether standardized products or special custom-tailored developments specified by the customer are required – the solutions and services of the SEG staff ranks among the top worldwide.

The performance and service provided by the business segment Power Protection is based more than 50 years of experience in High and Low Voltage applications which has led to numerous international references and technical leadership in the field of special niche products.

Development and testing of all our electronic devices complies, of course, with the relevant international standards and regulations like the IEC 60255.

Manufacturing and production of our products is subject to severe quality checks. This is also proven by the fact that we are certified according to ISO 9001.


New: HighPROTEC Release 3.7, KEMA Type Test

All HighPROTEC protection devices have been successfully tested with respect to all required type tests defined in IEC 60255-1:2009.

The KEMA has certified that all HighPROTEC devices are compliant with all requirements of IEC 60255-1:2009.


Explore our Product Lines




HighPROTEC, the next generation of protection relays from SEG Electronics, makes protecting medium voltage feeders, generators, transformers, and motors simple, reducing effort and cost.  It can be easily configured for specific application requirements and accepts 0‒800 VAC and 1A / 5A inputs, a wide range of supply power, communication protocols (DNP3.0, IEC 61850, IEC 60870-103, Modbus, Profibus), and menus in seven different languages.  It displays system connections, operating values, and messages/alarms/fault data – making it easy to use.  Worldwide certifications include CE, UL, CSA, EAC, and marine certifications.



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The modular protection devices from SEG Electronics for low voltage, medium voltage, and lower high voltage level have numerous and complex protection functions. The protection range includes basic time overcurrent protection, machine protection to high-grade differential protection.

In addition to relays with single protection functions, those with combined protection functions are available. Devices are designed for door mounting, either in separate housings or in 19“ racks. For back panel mounting an adapter is also available.

Thanks to our “plug-in” technology with automatic short-circuit mechanism for the current inputs, these relays can be changed during operation. LEDs and an alpha-numerical display show clear text indication of measuring, setting and fault values, and allow intuitive operation. Coupling to your SCADA system is achieved via the standardized interface.



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Professional Line

The digital separate or combined relays from SEG Electronics provide all common protection functions for low and medium voltage applications, and are designed for DIN rail mounting.

Rated voltage and frequency can be set by means of DIP switches; pick-up values and tripping delays via potentiometers.

The wide-range power supply for AC and DC make the relays universal.

An optionally available interface adapter enables the devices to communicate with the Windows ® PC software Smart view.



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WI Line

All relays from the WI Line are self-powered time overcurrent relays, which means they take their energy from the current transformers.

Since they do not require auxilliary power, the WI Line relays are well suited for use in self-sustaining transfer and distribution stations, local grids, and ring-main-units.

Tripping characteristics range from two-stage, independent (DEFT) and dependent (INV) time-overcurrent protection, up to special characteristic curves. As further options, we offer some relays with integrated earth fault protection.

SEG Electronics has also developed serial products, which match nearly any circuit breaker commonly available on the market. The electronic parts of the relays are completely sealed in. This makes the relays resistant to even the very worst environmental influences.



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Basic Line

SEG Electronics supervision relays for low voltage applications are equipped with a precise micro-controller and designed for DIN-rail mounting. They are easy to operate and simplify commissioning. This is advance technology at low price.



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SEG Setting and Operating Software - Smart view

Smart view is our parameter setting and evaluation software. It is intended to be connected with our protection devices, so that these can be set up using a Windows PC.

The full feature set, as available with e. g. HighPROTEC devices, comprises:

  • Menu-controlled parameter setting incl. validity checks
  • Offline configuration of all relay types
  • Reading and evaluating of statistical data and measuring values
  • Setting into operation assistance
  • Display of the device status
  • Fault analysis via event- and fault recorder

Smart view can be downloaded and installed free of charge from our download area at


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