SMA SUNNY ISLAND 4.4M Notice Résumée page 14

4 Grounding
Symbol Explanation
CE marking
The product complies with the requirements of the applicable EU directives.
RCM (Regulatory Compliance Mark)
The product complies with the requirements of the applicable Australian standards.
ICASA
The product complies with the requirements of the South African standards for telecommuni-
cation.
The product complies with the Moroccan safety and EMC requirements for electronic prod-
ucts.
4 Grounding
Safety in accordance with IEC 62109
In order to guarantee safety in accordance with IEC 62109, you must take one of the following measures:
• Connect a grounding conductor made of copper wire with a cross-section of at least 10 mm² to terminal
AC1 or AC2.
• If one grounding conductor each is connected to AC1 and AC2, each grounding conductor must be made
of copper wire and have a cross-section of at least 4 mm².
5 Information on Battery-Backup Systems
Wiring and connection of automatic transfer switches for single-phase or three-phase battery-
backup systems
• Do not bridge the neutral conductors of connections X1 to X5 in the automatic transfer switch. If the neutral
conductor connections are bridged, residual-current devices could trip accidentally.
• Label the equipment and devices of the automatic transfer switch in accordance with the schematic diagrams.
This will facilitate installation, commissioning and assistance in case servicing is required.
Connection of automatic transfer switches for single-phase battery-backup systems
In single-phase battery-backup systems, only the line conductor of the Sunny Island that is connected to the circuit
breaker F1 of the automatic transfer switch is monitored for grid failure. If terminal AC2 Gen/Grid L is connected
to another line conductor, the battery-backup system is not able to synchronize with the utility grid following a grid
failure.
• With single-phase battery-backup systems, connect circuit breaker F1 and terminal AC2 Gen/Grid L of the
Sunny Island to the same line conductor, e.g. to L1 (for a single-phase battery-backup system with an all-pole
disconnection function).
• Connect the PV inverter and the Sunny Island to the same line conductor if possible. This way, in the event of
grid failure, the PV inverters are supplied with voltage directly and then can feed in even if phase coupling is
deactivated.
14 SI44M-60H-80H-13-IS-de-10
SMA Solar Technology AG
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