SEG Protection Relays

SEG Electronics develops and manufactures intelligent protection devices for power generation and distribution. Their easy-to-operate, robust, and reliable protection relays can be used for the electrical protection of generators, transformers, engines, etc.

MSHS-SEG_protection relay-MCDGV4

HighPROTEC Protection Relays

The HighPROTEC line offers an outstanding solution for reliable medium voltage protection of distribution, generators, substations, and engines, 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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  • Easy to use (individual configurable devices with adaptable menu structure, plausibility check, ANSI menu structure can be turned on and off)
  • Reduces maintenance and service efforts (Integrated Fault Simulator)
  • Highest hardware flexibility (1A / 5A inputs, wide range power supply)
  • The operating software Smart View can be downloaded and installed without extra charge.
  • 8 selectable languages within the relay (English / German / Spanish / Russian / Polish / Portuguese / French / Romanian)
  • Various communication protocols (IEC 61850, Modbus, DNP3, Profibus, IEC 60870‑5‑103)
  • Worldwide certifications: CE, UL, CSA, EAC
  • Covers Worldwide interconnection standards: IEEE1547, BDEW, G99‑1‑3


New as of Release 3.7:

  • Compatibility with VDE‑AR‑N‑4110/4120:2018
  • G99 Issue 1 Amendment 6 – March 2020
  • KEMA “Type Test Certificate” for all devices of the HighPROTEC-Series
  • Further improved frequency and ROCOF protection elements
  • Improved stabilization against CT saturation (Diff. Protection / ANSI 87) during external faults
  • SCADApter, also IEC 60870-5-103 and Profibus DP customizable
  • Additional Improvements on IEC 60870-5-103 and Profibus DP
  • Smart View: Improved Usability
MSHS-SEG-HighTECH-protection relays

HighTECH Line

Modular protection devices for low voltage, medium voltage, and lower high voltage levels with several protection functions. The protection range includes basic time overcurrent, machine, and high-grade differential protection.

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

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MSHS-SEG-WI-protection relays

WI Line

All relays from the WI Line are self-powered time overcurrent relays, which means they take their energy from the current transformers without requiring auxiliary power, making them 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, and integrated earth fault protection.

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Ready to serve you

Full service locations in Southeast, the Gulf Coast, and the Pacific Northwest, plus a network of local representatives throughout the Americas and the Caribbean.

Estamos disponible para servirle
Instalaciones de servicio completo en el Sureste; Costa Noroeste, y El Golfo. Además una red de agentes en
América Latina y el Caribe.

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Specializing in turnkey engine services, control systems, and engineered solutions for the Marine, Industrial, Energy, and Defense/Government Sectors, MSHS is ready to serve you!