SGen-100A/SGen-1000A generator series

Proven two-pole air-cooled generator for industrial and large power applications

    Rotate product

    High-voltage 3-phase electrical air-cooled generator with cylindrical rotor

    Proven Siemens MICALASTIC® insulation system with GVPI technology

    Coupling design adaptable to different turbine types of any manufacturer

    Direct radial air cooling of the rotor winding and indirect air cooling of the stator

    Base design in accordance with IEC and IEEE / ANSI standards, other standards available as options

    Reduced vibrations and noise through flex plates supporting the stator core

    Brushless or static exciters for operational flexibility

    Performance range 25‐370 MVA

    Efficiency up to 98.9%

    Highly efficient generator for sustainable power supply

    Excellent performance and outstanding efficiency

    Our air-cooled generator series offers you a competitive advantage by providing ratings of up to 370 MVA with operationally proven technology. The SGen-100A series with 25–180 MVA is optimized for industrial applications and the SGen-1000A series with 180–370 MVA for large power applications. We continuously improve our generators and focus on increased reliability, improved serviceability, high efficiency, and optimum plant integration. Our generator designs benefit from more than 150 years of engineering experience going back to the invention of the electrical generator by Werner von Siemens in 1866.


    Highlights of the SGen-100A/ SGen-1000A series generator

    The entire SGen-100A/1000A series is optimized for world-class efficiency of up to 98.9% and stability during load changes and flexible operation. They are designed for 10,000 start/stop cycles during their operational life, making them a cost-effective alternative to hydrogen- or water-cooled generators for industrial applications up to 370 MVA.

    Our experts have designed a product line that meets all major market and application requirements. By applying our modular design philosophy and using pre-designed options, we can customize your generator the way you need it with minimum lead time.

    The proven Siemens MICALASTIC® insulation system with Global Vacuum Pressure Impregnation (GVPI) technology ensures maximum electrical endurance and outstanding availability.


    Your benefits:
    - Insensitive to thermal cycling
    - No maintenance required
    - Very low mechanical stress during operation
    - Non-flammable and self-extinguishing; no fire-extinguishing system needed

    The SGen-100A/1000A series is designed and manufactured for ease of use. Our robust and proven design features pre-assembled components to shorten the commissioning period. The self-supporting structure of the base frame with integrated cover, machine auxiliaries, and exciter set facilitates easy on-site installation.

    There are more than 1,000 air-cooled generators in operation. Our design, engineering, sales, project management, manufacturing and testing experts work closely together in one location in Erfurt, Germany. By using the latest manufacturing technology and process automation we ensure outstanding quality.




    Technology overview

    Our generators are designed using our building-block system with optimized diameter and length sizing to achieve perfect alignment with your plant and the grid requirements. Grid studies can be performed. Many more options are available including variants of the cooling system and the position of the generator leads. All parts and connections are readily accessible and the enclosure can be easily removed for installation or maintenance.



    Flexibility and customization

    Our modular design philosophy, using pre-designed options, ensures that we can customize your generator the way you need it. The generator matches your turbine's performance and provides margin for operational flexibility.



    Robust design

    Mechanical forces from operation and transient events, such as short circuits, are safely transmitted from the stator core to the base frame and foundation via welded-on spring elements. The self-supporting structure of the base frame with integrated cover, machine auxiliaries and exciter set allows for easy on-site installation.



    Service and maintenance

    Our proven installation and maintenance concept sets a benchmark in reliability and availability. Professional installation of the generators ensures world-class availability and reliability for the entire lifecycle of the generator. For minimized downtime, we align the maintenance intervals of the generator with those of the turbine.



    Remote Diagnostic Service

    Remote Diagnostic Service (RDS) help you to optimize your asset production by turning data into value. In a proactive approach, we monitor the complete range of oil and gas, and industrial rotating equipment in more than 80 countries to identify a potential problem before it impacts operation. We aim to maximize the availability and reliability of our customers' installed base.



    Technical data

    Download table as: PDF Excel
    Frequency 50 Hz 60 Hz
    Apparent power 25–180 MVA 25–180 MVA
    Efficiency up to 98.5% up to 98.5%
    Designed for power factor 0.80 0.85
    Terminal voltage 6.3–15.75 kV 6.3–15.75 kV
    Download table as: PDF Excel
    Frequency 50 Hz 60 Hz
    Apparent power 180–370 MVA 180–370 MVA
    Efficiency up to 98.9% up to 98.9%
    Designed for power factor 0.80 0.85
    Terminal voltage 10.5–20 kV 10.5–20 kV

    The SGen-100A is suitable for the following applications and industries:


    Air-cooled generators fit to most steam and gas turbines on the market

    Flexible gas and steam power plants will remain a key component of a demand-driven power supply.
    They form the solid foundation of a diverse and clean energy mix – indispensable for meeting the world's current and future challenges. Our air-cooled generators complement the turbine packages of any manufacturer and meet grid and environmental requirements as well as specific customer needs.



    Operational safety and special explosion protection solutions

    Oil and gas power applications, especially offshore applications, require low-weight generators with explosion protection solutions (e.g. pressurized or non-sparking) and entail stringent electrical standards. We can supply solutions for a broad variety of applications.



    Replacement of older, high-maintenance generators

    With our Footprint™ generator concept we offer solutions to replace older, high-maintenance water-, hydrogen- or air-cooled generators with state-of-the-art SGen-100A generators. The modular design of our generators can be adapted to match existing foundations and plant interfaces to minimize reconstruction costs and installation time. This can be a time- and cost-effective alternative to repairing an existing generator.



    Transmission grid stabilization

    Synchronous condenser solutions are introduced worldwide to counteract grid instability resulting from the growing integration of renewable power sources into the transmission system. We offer tailor-made turnkey synchronous condensers to address your needs based on proven, reliable in-house equipment, extensive know-how in transmission system requirements, and project execution experience.



    Natural sources for power generation

    You can benefit from our fleet experience using natural sources for energy production. Adapted for steam turbines, our generators are used for biomass, waste-to-energy, concentrated solar power (CSP) and geothermal power plants.



    Downloads, service and support

    Find out more about our products and services

    You would like a brochure, are interested in technical details or further information? Please visit our download section below, or contact us directly for specific inquiries – we are looking forward to talking to you.


    Proven in commercial operation: SGen-100A/1000A series reference highlights

    More than 1,000 SGen-100A/SGen-1000A generators are in commercial operation around the globe.


    Reference map



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