SMA SUNNY ISLAND 4.4M Instrucciones Breves página 5

SMA Solar Technology AG
Symbol Explanation
Battery
Lead-acid battery
Lithium-ion battery
Utility grid
SMA Energy Meter
Off-grid system
Battery-backup system
Grid disconnection
Grounding device
1.5 Explanation of Used Terms
Term
Grounding device
Battery-backup system
Stand-alone grid
Off-grid system
Grid disconnection
Grid disconnection with all-pole
disconnection
Quick Reference Guide
Symbol
Explanation
In the case of all-pole disconnection, the functional group grounding device is
part of the automatic transfer switch of the battery-backup system and enables
protection against indirect contact with live components.
In the event of grid failure, a battery-backup system supplies loads with energy
and a PV system disconnected from the utility grid with voltage.
Stand-alone grids are self-sufficient utility grids that are supplied with power from
different energy sources. The Sunny Island forms the stand-alone grid and regu-
lates the balance between the energy that is fed in and the energy that is used.
All components belonging to the stand-alone grid (e.g., Sunny Island)
The functional group grid disconnection is part of the automatic transfer switch of
the battery-backup system and disconnects the battery-backup grid from the utility
grid in the event of grid failure.
In the event of grid failure, a tie switch disconnects all line conductors and the
neutral conductor from the utility grid.
1 Information on this Document
Explanation
PV array
Existing protective devices (e.g. in the
SMA Flexible Storage System)
AC loads
Generator
Existing house distribution board with
protective devices (e.g. in the battery-
backup system)
Grid-connection point with energy me-
ter of electric utility company
SMA Flexible Storage System
Grid disconnection with all-pole discon-
nection
Grid disconnection without all-pole dis-
connection
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