SMA WB 5000-US User Manual
US
Wind power inverter
WINDY BOY 5000-US/6000-US
WINDY BOY 7000-US/8000-US
Addendum operating requirements
1 Notes on this addendum
1.1 Validity
This addendum does not replace the attached Sunny Boy installation guide.
• Pay attention to all operation and safety instructions listed in the Sunny Boy installation
guide.
• The Sunny Boy installation guide is delivered with the Windy Boy inverter.
This addendum describes necessary confingurations for operating a Windy Boy in combination with
a small wind turbine system.
This addendum is valid for the following Sunny Boy installation guides:
• Sunny Boy 5000-US
• Sunny Boy 6000-US
• Sunny Boy 7000-US
• Sunny Boy 8000-US
The listed types of inverters are referred to in the following as Windy Boy.
1.2 Target group
This addendum is for qualified personnel. Qualified personnel have received training and have
demonstrated skills and knowledge in the construction and operation of this device. Qualified
personnel are trained to deal with the dangers and hazards involved in installing electric devices.
1.3 Appropriate usage
Use the Windy Boy only in combination with a small wind turbine system having a permanet magnet
generator.
Do not operate the Windy Boy without using a rectifier with overvoltage protection like
the WindyBoyProtection Box.
Do not use the Windy Boy for purposes other than those described here. Alternative uses,
modifications to the Windy Boy or the installation of components not expressly recommended or sold
by the manufacturer void the warranty claims and operation permission.
DBWB50-80US-UUS113611 | DBUS-WB50-80US | Version 1.1
SMA America, LLC Electrical connection
Figure1: Concept of a wind turbine system using this Windy Boy
When designing the wind turbine system, ensure that the values comply with the permitted operating
range of all components at all times.
The manufacturer of the wind turbine must have approved the turbine for use with the Windy Boy.
2 Electrical connection
2.1 Safety precautions
Risk of electric shock due to high voltages inside the Windy Boy.
Death or serious injuries will result.
• All work on the Windy Boy must only be carried out by qualified personnel.
• All work on the Windy Boy must only be done as described in this manual.
• Pay attention to all safety instructions.
Electrostatic discharges possible when components are touched.
Damage to components will result.
• Follow ESD protective provisions.
• Remove existing electrostatic charges by touching a grounded metal surface
(e.g. housing).
Addendum operating requirements DBWB50-80US-UUS113611 2/12
SMA America, LLC Electrical connection
2.2 Load disconnection unit
Risk of electric shock due to missing protective function on the line circuit breaker.
Death or serious burn injury will result.
When a generator and a consumer are connected to the same line circuit breaker, the line circuit
breaker loses its protective function. The current from the inverter and the grid can add up to
overcurrent which is not detected by the line circuit breaker.
• Never connect loads between the inverter and the line circuit breaker without protection.
• Always install separate fuses for loads.
A screw type fuse element, e.g. D system (Diazed) or D0 system (Neozed) is not a circuit breaker,
and thus must not be used as a load disconnection unit. When disconnecting under load, the fuse
element may be damaged or its functionality may be impaired by contact burning. It only acts as
cable protection.
• Use only line circuit breakers as load disconnection units!
Detailed information
Detailed information and sample designs of a line circuit breaker can be found in the
TechnicalInformation "Line circuit breaker" in the download section of
www.SMA‑America.com.
2.3 Connecting the turbine to the rectifier
Destruction of the inverter by overvoltage.
If the voltage of the small wind turbine system exceeds the maximum input voltage of the inverter, it
can be destroyed by the overvoltage. All warranty claims become void.
• Install overvoltage protection, e.g. Windy Boy Protection Box, between the small wind turbine
system and the inverter.
For proper connection refer to the installion guides of the wind turbine system and the attached Sunny
Boy installation guide.
2.4 Connecting the rectifier to the Windy Boy
For proper connection refer to the attached installion guide of the Sunny Boy and the rectifier.
Addendum operating requirements DBWB50-80US-UUS113611 3/12
SMA America, LLC Turbine operation
3 Turbine operation
The Windy Boy is a single phase inverter that converts DC current into AC current and feeds the
energy generated by a wind turbine system into an existing power supply system.
The Windy Boy inverter has a special operating mode for wind generators (see figure below). That
allows performance adjustment to the characteristic curves for generators of many different
manufacturers. In this way maximum yields can be obtained from your wind turbine system.
Figure2: Operation mode display
The mechanical power of the wind turbine is delivered to the Windy Boy in the form of a direct,
rotational-speed variable DC voltage (RPM) and current intensity (torque).
Most small wind turbine systems have a permanent magnet generator. For converting the variable
frequency AC generator voltage into DC current a rectifier like the Windy Boy Protection Box is
needed.
If a different operation mode is displayed:
• Activate the operating mode "Turbine" by using Sunny Data Control.
• If problems occur contact the SMA Serviceline.
3.1 Characteristic curve function
The "Turbine" operating mode of the Windy Boy uses a programmable characteristic curve to regulate
the input current depending on the generator voltage.
A characteristic of wind turbine systems is that for every rotational/wind speed there is a different
optimal working point for voltage and current. This behavior is not linear.
The Windy Boy approaches this non-linearity using an approximation composed of a number of
connected linear functions. These can be programmed by the user to correspond closely to the
behavior of the small wind turbine system and thus provide performance adaptability.
Addendum operating requirements DBWB50-80US-UUS113611 4/12
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