The rugged LCI variable speed and starting converter for large synchronous motors and generators

sinamics gl150 12p 12p water cooled

The LCI-converter (load commutated inverter), SINAMICS GL150, is designed for single-motor applications with variable and constant torque characteristics in power ratings up to 85 MW (Higher ratings on request). Available in air- and water-cooled designs and capable of 2Q or 4Q operation. Commonly used for variable-speed operation as well as for start-up operation of large synchronous motors and generators and with speeds ranging up to approx. 7000 rpm.

New SINAMICS GL150 innovation design

The converter power section of the air-cooled SINAMICS GL150 has been upgraded to provide an optimized solution in the lower power range (6p/6p up to 5 MW; 12p/12p up to 9 MW).

The new innovative design is characterized by:

  • Economic and highly-efficient drive design

  • Compact dimensions

  • Arc fault- and earthquake tests proved design

  • Accessibility of the low-voltage section, even during operation

  • An special "line-side fuses" retrofit option integrated in the design

Your Benefits

  • Compact design and highest power density

  • Easy plant integration due to compact design and highly flexible configuration

  • Simple operator control with the user-friendly operator panel

  • High reliability and ruggedness through the use of extremely robust thyristor technology and fuseless design, combined with an intelligent response to external disturbances

  • Hassle-free integration into higher-level automation systems through analog and digital interfaces and PROFIBUS DP

  • Designed for synchronous motors in an almost maintenance-free design

Technical data overview

Brief overview

Line voltage

Air-cooling (6- / 12-pulse)
Power (MVA/MW)

Water-cooling (12-pulse)
Power (MVA/MW)

to 3.0

1.4 to 8.1 / 5.7 to 16.2

6 to 16

to 5.2

5.7 to 9.7 / 11.4 to 30

21 to 32

to 7.8


31.5 to 48

to 10.4


50 to 64

to 12.0


58 to 85

Applications – by industry

industries oil gas siemens

Oil & Gas

Chemical & Petrochemical

Chemical & Petrochemical

Most commonly found in the Oil & Gas industry with applications that require a starting converter or where the power required is over 30 MW with large compressors or pumps, especially common in some LNG applications.

 Large compressors - above 30 MW Large pumps - above 30 MW

Primarily used in the Chemical & Petrochemical industry for the more complex applications with power requirements over 30 MW, such as really large pumps.

 Large pumps - above 30 MW
industries marine siemens


industries power generation siemens

Power Generation

industries metals siemens


Available for various ship applications and is often used in main propulsion, boosters and shaft generator applications.

 Main Propulsion-Boosters Shaft generators

Used in numerous pump and fan applications in the power generation industry, one example of a pump application are boiler feed pumps. It can also be used in starting applications for generators.

 Pumps Fans Starting generators

Especially appropriate for use in starting blast furnace applications and with operation of wire rod mills.



An Integrated Drive System ensures fast installation, safe operation, and higher than 99% availability at the largest blast furnace at Kunming Iron & Steel in Yunnan.

Compatible Motors

1 | 2

simotics hv synchronous high speed

SIMOTICS HV Synchronous High-Speed

Modular High-speed synchronous motors for for compressor drives with the highest power ratings

simotics h modyn

SIMOTICS HV HP (synchronous)

Modular high power synchronous motors for accelerated projects and maximized plant availability in the double digit power range

simotics series metals

SIMOTICS HV Series Metals

Synchronous high-voltage motors specifically designed for main rolling mill drives

simotics series ship


High-voltage motors specifically designed for ship applications