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Sunny Island
BPRE
Mains
K3
AC-
F2
Outlet
Sunny Island
The switch-over times can also be reduced by means of a more complicated wiring
for the connection to the recovered external utility (Fig. 3.13). Of course, the Sunny
Island can by no means forecast a failure of the external utility. Thus, it is in principle
not possible to reduce this time during the switch-over to island operation mode.
Fig. 3.13 does not show the necessary wiring of voltage sensor cables either.
BWRI33-12:EE
SI-
13
14
N
L
L
N
external distribution
Fig. 3.12: Connection to an external utility
Installation & Operating Instructions
2 A
L
N
- 35 -
L
N
Grid
utility grid
SMA Regelsysteme GmbH
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