SMA WB 3000-21 Installation - Manual (Page 10)

2 Safety SMA Solar Technology AG
10 WB3-5TL-21-IA-en-10 Installation Manual
2 Safety
2.1 Intended Use
The Windy Boy is a transformerless wind power inverter that converts the rectified alternating current
of a small wind turbine system or other energy converters based on permanent magnet electric
generators into alternating current suitable for the grid and feeds this energy into the power
distribution grid or stand-alone grid.
Figure 1: Principle of a small wind turbine system with Windy Boy
The Windy Boy is suitable for indoor and outdoor use.
The Windy Boy may only be used with small wind turbine systems or with energy converters based
on permanent magnet electric generators (e.g. water energy plants, CHP plants, diesel generators).
The small wind turbine system or energy converter must be suitable for use with the Windy Boy and
approved by the small wind turbine system or energy converter manufacturer. SMA Solar Technology
recommends operating Windy Boy together with a small wind turbine system without neutral
grounding.
The Windy Boy must not be connected to a direct current supply grid.
An overvoltage protection must be installed between the Windy Boy and the rectifier to limit the direct
voltage. Use only an overvoltage protection that is designed for the maximum power of the small wind
turbine system. SMA Solar Technology recommends using the Windy Boy Protection Box of type
500-11. If you are not using the Windy Boy Protection Box of type 500-11, you must install a capacity
of at least 120 μF between the Windy Boy and the rectifier. A low DC voltage ripple has a positive
effect on the electrical endurance of the inverter.
All components must remain within their permitted operating ranges at all times.
Alternative uses of the Windy Boy not expressly recommended by SMA Solar Technology AG are
not permitted.
The Windy Boy must not be connected in parallel with other inverters on the DC side.
Windy Boy Protection Box Windy Boy
power
distribution grid
Small Wind
Turbine System
Load resistor