Connecting External Sources
SMA
Technologie AG
Page 110
SI5048-11:EE4206
Technical Description
14.2 Grid
The Sunny Island 5048 supports the operation of grid backup systems on the grid.
Here, a distinction is made between two main states: either a main power grid and
stand-alone grid are connected or a main power grid and stand-alone grid are
disconnected. The operating mode of the inverter is derived from this. If the stand-alone
grid is disconnected, the inverter is solely responsible for powering this stand-alone
grid. If the grid is connected to the stand-alone grid, the stand-alone grid is powered
from the main power grid. The voltage and frequency in the stand-alone grid and in the
main power grid are identical.
14.2.1 Conditions
In order to operate on the grid, very strict limits (for voltage and frequency) must
generally be maintained. This strict limits are not sensible for generator operation. The
limits are therefore set separately for grid operation and the generator limits are not
used.
14.2.2 Starting the Sunny Island 5048
The Sunny Island 5048 always starts in stand-alone grid operation. Once the device
is operating, it checks for the presence and availability (voltage and frequency) of the
external grid.
14.2.3 Stand-Alone Grid Operation
The main power grid and stand-alone grid are disconnected and the inverter powers
the stand-alone grid. The system waiting for the grid to reconnect is an indication of this
state.
Under specific conditions, the system can also temporarily feed energy from the
stand-alone grid into the main power grid in the GridCharge operating mode
("#250.08 GdMod" parameter).
The default settings for limits during grid operation comply with the following
standards:
•
For 230V_50Hz: DIN VDE 0126-1-1 (not entirely)
•
For 220V_60Hz: UL1741
The Sunny Island 5048 does not meet the VDE 0126-1-1 directive required
in Germany and, for legal reasons, it must therefore be MSD-certified (e.g.
by UfE GmbH) when operated while connected to the public grid.
Summary of Contents for Sunny Island 5048
Page 22: ...The Sunny Island 5048 SMA Technologie AG Page 22 SI5048 11 EE4206 Technical Description...
Page 26: ...Safety Instructions SMA Technologie AG Page 26 SI5048 11 EE4206 Technical Description...
Page 94: ...Battery Management SMA Technologie AG Page 94 SI5048 11 EE4206 Technical Description...
Page 114: ...Connecting External Sources SMA Technologie AG Page 114 SI5048 11 EE4206 Technical Description...
Page 160: ...Contact SMA Technologie AG Page 160 SI5048 11 EE4206 Technical Description...
Page 169: ...SMA Technologie AG Glossary Technical Description SI5048 11 EE4206 Seite 169...
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