OFFERING MEMORANDUM Global Offering of up to ... - Nordex

Medium voltage A type of voltage. The grid distinguishes between high voltage
(greater than 30kV) for long-range transmission, medium voltage
(up to 30kV) for local grids and low voltage (up to 1 kV) for normal
end-users. Wind turbines are normally connected to the mediumvoltage
grid via a transformer.
Megawatt (MW) Unit for measuring the performance of a wind turbine. 1MW=1,000
kilowatts or 1,000,000 watts.
Megawatt turbine A turbine with a nominal output of one megawatt or more.
Multipole generator A generator with several poles which raises the generated
frequency at low rotor speeds. This can mean that a complicated
d gear between rotor and generator may not be needed.
Nacelle The nacelle contains the most important components of the wind
turbine the d drive train as well as the electronic and electrical
components. The maintenance staff can access the nacelle from
the mast. The rotor is located at the front of the nacelle and
consists of the rotor blades and the rotor hub.
Nominal output The ultimate permanent output level of a wind turbine or rather its
generator. If a wind turbine has a nominal output of 1,300kW, it
means that it produces 1,300kW per hour if it is operating at
nominal level. The nominal output of a wind turbine, however, does
not give an indication as to the level of energy it actually produces,
since a wind turbine operates only for a few hours per year at its
nominal level. In order to assess how much energy a wind turbine
actually produces it is necessary to know the wind conditions on
the individual site. An expertise on wind conditions is the best way
to assess this.
Nominal rotation speed Rotation speed of the rotor/generator required for nominal output.
Offshore wind turbine A turbine constructed at sea.
Onshore wind turbine A turbine constructed at land.
Operations control system A system automatically controlling a turbine’s operation.
OptiSlip OptiSlip (optional slip) is a special control system for d
asynchronous generators to match the rotation speed of the
rotor to the grid frequency which works on the basis of an
increased generator slip. The system is much simpler in technical
terms than normal asynchronous technology.
Output Output is energy per unit of time measured in Watts. Output is
measured at any specific time, while energy is measured over a
period of time (d nominal output.)
Pitch bearing The component which attaches the turbine d nacelle to the tower,
allowing it rotate about the tower. A turbine’s tower is anchored in
the ground, and as it must be possible for the rotor, generator, etc.
to be turned into the wind, these are mounted on the pitch bearing
which allows rotary movement.
Pitch-regulated wind turbine A specific type of wind turbines which ensures a steady rotor
rotation speed by using a d blade pitch adjustment. The turbine’s
electronics sensor constantly monitors the power output of the
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