Industry Renewable Energy



Renewable Energy.

In modern wind turbines and solar power plants the requirements to the electrical installations are extremely high. With equipping far over 4000 turbines per year, SANGEL® Systemtechnik provides all necessary experience in this field.

Similar to the classical machine building, the degree of automation in the technology of wind energy and solar power plants has increased over the last years. To be able to position the rotor blades of a wind turbine for optimum usage of wind or the mirrors of solar systems for optimum collection of sunrays, modern drive technology with the superordinate automation components are required.

Due to the fact that this technology is often built in areas with very extreme climate conditions, the requirements towards the electrical installation are extremely high. Very high or very low ambient temperature as also aggressive sea water air or ultra-violet light, for example, strain the used components and systems above average. Complete supply: from connection lines for the repositioning of the rotor blades, complex system solutions for complete loop control to cable assemblies for energy distribution and interconnections, SANGEL® is a complete-supplier for this field.

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Would you like personalised advice?

Then get in touch with us. Our drive and industry expert Christian Gladis will be happy to advise you. Together we will find the right system for you.


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Blog / News.


Wind Energy

We`ve got the hang of it.


Renewable energy production is becoming increasingly important, especially wind turbines. With a hub height of 60 meters and 1.5 megawatts of power, wind turbines that were originally considered to be enormous are now standard and built worldwide using German technology. In order for the turbines to work perfectly as well as cost-effectively, the optimum balance between torque and speed must be found. For this, it is necessary to be able to adjust the rotor blades. It’s not enough to turn the head of the turbine into or out of the wind. In case of high wind speeds, rotor blade adjustment is an additional way to apply the brakes effectively and an important safety aspect.


All three rotor blades must always be aligned synchronously, because excessive forces can otherwise act on a single blade. This means the rotor blade adjustment must have a central control system that is also guaranteed to function even in case of power failure. To make the task even more difficult, the hub is only accessible from the outside. On the shaft of the rotor, only a few contacts are available on the slip ring for establishing a connection. A control system via the hub and accommodation of rotor blade technology in the nacelle are therefore not possible. On-site installation in the hub is not practical and economical due to the height and difficult accessibility.


The entire rotor blade adjustment system is supplied with electrical power just through the slip rings, so only a few contacts of the slip ring are necessary. A central control box coordinates the rotor blade positions, which are each adjusted by their own drive control. This includes a battery pack to maintain control capability in case of power failure. Everything is modular and ready to plug in. All connections are pre-tested on a specially designed test station with contact force monitoring, eliminating errors and ensuring fast commissioning.

The central control module connects the individual drive controls with a single connector kit in each case. These align the rotor blade with a servomotor. The pre-fabricated installation can be quickly incorporated into the hub on the ground. Supply, signals and bus are consolidated in a single robust plug connector. The rotor blade is completely installed electrically in no time.