SMA SC 200 - Manual (Page 15)

SMA Solar Technology AG Grid Security Management
User Manual SC-BEN100262 15
3.3 The Solution from SMA Solar Technology
With the Power Reducer Box it is possible to implement active power limitation in accordance with the
requirements of grid security management (GSM) for a PV system.
To do this, four digital states (e.g. of a radio ripple control receiver) can be imported via the the Power
Reducer Box, thus enabling the Sunny Central to be set according to the specifications of the utility
operator.
The four input ports are freely configurable via the integrated web interface. If a signal from the radio
ripple control receiver is present, the Power Reducer Box analyzes the signal and relays an instruction
via the Ethernet network to the registered Sunny WebBox devices.
Activated Sunny WebBox devices transfer the instruction to the connected Sunny Central.
Events are recorded onto the internal memory of the Power Reducer Box. In addition, it is possible to
write events onto an SD card or download events via the web interface.
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Besides the Power Reducer Box, there are two further options for meeting the requirement of grid
security management. These are 1) reception of the signals via an analog input on the Sunny Central
and 2) manual setting of default values via parameters.
How to implement these options is described in this manual.