SG 3.4-145

Onshore wind turbine

Delivering India’s positive energy

The new SG 3.4-145 wind turbine is designed to achieve the long-term wind energy targets of the country and complies with the expectations of the wind energy investors. The SG 3.4-145 is optimized for Indian wind conditions with a clear objective to deliver the lowest Levelized Cost of Energy (LCoE), and a great opportunity to accelerate wind-powered growth for the country. In other words, it is indeed delivering India’s positive energy.

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Rotor diameter
145 m
Nominal power
3.465 MW
Special features
Key Facts
  • Optimized design for low wind conditions
  • Benchmark solution with high capacity factor
  • 48% more AEP than the previous SG 2.2-122
  • Up to 3.6 MW with flexible rating strategy
Recommended for

Low wind, onshore location

Other low and medium-wind turbines
Model Rotor Diam. Wind type
SG 2.2-122 122 m For low wind
SG 5.0-145 145 m For medium winds
SG 5.8-170 170 m For low and medium winds
Based on proven technology
General details
Rated power 3.465 MW
Wind class IEC III/S
Flexible Power rating 3.6 MW
Control Pitch and variable speed
Standard operating temperature Range from 0ºC to 45ºC (with de-rating)
Diameter 145 m
Swept area 16,513 m²
Power density 209.8 W/m²
Length 71 m
Airfoils Siemens Gamesa
Material Fiberglass reinforced with epoxy resin
Type Multiple technologies available
Height 127.5 m and site-specific
Type 3 stages
Type Doubly-fed induction machine
Voltage 690 V AC
Frequency 50 Hz
Protection class IP 54
Power factor 0.95 CAP-0.95 IND throughout the power range (1)

(1) Power factor at generator-output terminals, on low voltage side before transformer input terminals.

The most optimal product for low winds
AEP Increase SG 3.4-145 vs SG 2.2-122 
The SG 3.4-145 wind turbine joins the Siemens Gamesa portfolio with a clear objective: to complement the product offer for low wind sites where markets require nominal powers higher than 3 MW at an optimum Levelized Cost of Energy. The SG 3.4-145 wind turbine is based on the SG 3.4-132, with several GWs installed worldwide. Thanks to the operative experience accumulated over 40 years in the wind energy market, and the application of thoroughly tested and validated technologies, this Class III/S solution ensures high performance and reliability.  
Technological highlights
Our onshore approach is focused on geared technology, in which we have extensive knowledge and expertise. The hallmarks of Siemens Gamesa turbines are: reliability, robustness and a modular, flexible design for optimum adaptation and maximization of production at any site and in all wind conditions. 
This turbine is equipped with blades made of fiberglass reinforced with epoxy resin. Together with the state-of-the-art aerodynamic profile, we can produce lighter blades having greater strength and improved dynamic behavior with less load transmitted to the rest of the components.
Thanks to OptimaFlex technology, we go beyond the traditional off-the-shelf approach that results in products that are sub-optimal for many sites, and we deliver a uniquely tailored solution that is perfect for our customers’ specific needs. Optimized site design combined with a customizable product platform, based on flexible power rating, site specific towers and optimized BoP solutions, allow Siemens Gamesa to deliver reduced LCoE by increasing AEP while optimizing cost.
Turbine sensors continuously transmit data to our diagnostic centers, enabling the early detection of anomalies and preventing potential failures. By analyzing vibration patterns we can optimize your service plan and anticipate repairs before serious damage occurs.
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The solutions we provide are driven by the benefits they deliver. This applies as much to our pursuit of absolute safety as to maximizing your return. Whether by inventing a new technology, evolving an existing product, or simply finding a smarter way of working, we strive to lower costs and raise returns on investments.

Our experts are on hand to help with any questions you have. Email us, or log in to our customer portal. Here you’ll be able to monitor configuration, production, and agreements for your wind power plants, and find relevant news from Siemens Gamesa Renewable Energy.

Operating in around 90 countries, Siemens Gamesa offers an extensive range of onshore wind turbine technologies to cover all wind classes and site conditions. By listening to our customers - and backed up by almost 40 years of experience - we know just what it takes to develop and manage a successful onshore project.
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