SMA WB 3000-US - Manual (Page 3)

SMA America, LLC Electrical connection
Addendum operating requirements DBWB30-40US-UUS113610 3/12
2.2 Load disconnection unit
2.3 Connecting the turbine to the rectifier
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.
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
Technical Information "Line circuit breaker" in the download section of
www.SMA‑America.com.
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.