Variable-speed Gearbox for Pumps & Compressors
SETCON is an electro-mechanical variable-speed gearbox designed to control the speed of large pumps, compressors, fans and blowers. With the highest overall efficiency, compared to other geared VSDs, SETCON is an outstanding and reliable variable-speed drive for your application.
Rated Power: 1 MW – 18 MW
Input shaft: 1 500 rpm / 1 800 rpm
Output shaft: up to 15 000 rpm
Variable speed range: 50 % – 105 %
Area classification: Non-Ex, Ex
Energy efficiency: up to 97 %
Integrated Lube Oil System: SET Std. / API 614
Machinery Protection System: SET Std. / API 670
Soft-Start of Main Motor: yes, integrated

SETCON: The All-in-One Solution

= lowest life cycle costs (LCCs) on market

Why SETCON

    • Highest Energy Efficiency
      SETCON technology achieves outstanding efficiency — far above conventional variable-speed systems.
      The result: lower power consumption and reduced operating costs.
    • Robust Low-Voltage Frequency Converters (20% of total power)
      Designed for reliability and simplicity, SETCON systems use small, durable Frequency Converters that ensure smooth, efficient, and low-maintenance operation.
    • Allows Synchronous Motor Integration
      Enables grid stabilisation and reactive-power support — a key advantage for industrial applications.
    • Standardized Gearbox Design
      Manufactured to ISO, API or AGMA Standards for proven quality and reliability.

Set-Up

Set-Up Drive Train

Functional description

The SETCON® System consists of a Gearbox incl. differential gear (planetary gear) (1), Servos in combination with a low-voltage Frequency Converter (2+3) and a Control Cabinet (4). The constant power supply is done by an electric motor as the medium-voltage Main Motor (5). The variable output is transmitted to a Driven Machine (6) e.g. a Pump or Compressor. The medium-voltage Main Motor (5) is connected directly to the MV-grid and drives the planetary gear’s ring gear at constant speed. The differential gear’s sun wheel transmits the variable speed through an optional high-speed gear unit (offset alignment) to the Driven Machine (6). The differential gear’s planet carrier is connected to the Servos. The speed of the Servos (2) is controlled firstly in order to ensure the speed at the Driven Machine (6) is variable when the speed of the Main Motor (5) is constant, and secondly to control the torque in the entire drive train.

Retrofit Project

SETCON® Flagship Project in Germany

SETCON variable speed gearbox has been successfully running at the power plant Mittelsbüren in Bremen, Germany operated by swb Erzeugung AG. As the retrofit project, SETCON gearbox provided energy savings of app. 12 800 MWh per year. SETCON SE6R replaced the existing...

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