Siemens 4MW spearheads platform strategy

The Siemens 4MW prototype

Germany’s Siemens will today launch its recently unveiled 4MW wind turbine, the SWT-4.0-130, as the flagship in a “platform” strategy aimed at standardising its machines in four main groups for mass production.

The new model, which features ultra-flexible 63-metre blades, will target the “comfort zone” offshore projects — developments in depths of up to 30 metres and less than 30km from shore — using a design built around the company’s workhorse SWT-3.6-120.

Nacelle and tower are “advanced variants” of the 3.6MW turbine — 500 of which have been erected around the globe, with another 1,200 on order — while the drivetrain is an evolved version of its predecessor’s three-stage, geared concept, powering an asynchronous generator.

The aeroelastic B63 blades, said to be the “longest and most technologically advanced” in the 4MW class, have been developed…

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