Sunny Island
Installation & Operating Instructions
BWRI33-12:EE
- 35 -
SMA Regelsysteme GmbH
Sunny Island
13
14
N
L
F2
external distribution
Mains
K3
AC-
Outlet
2 A
L
N
L
N
Grid
L
N
utility grid
SI-
BPRE
Fig. 3.12: Connection to an external utility
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.