Sunny Island 4500
Installation & Operating Instructions
BWRI45-13-EE0304
- 51 -
SMA Regelsysteme GmbH
3.4.6 Connection of a Generator
If e. g. a diesel generator is integrated into the island grid, not only the measurement
signals listed in Chapter 3.3, but also the control signals “Generator start“ and “Gen-
erator contactor“ have to be wired as shown in Fig. 3.10.
The generator is switched on with the relay “Generator start“ (K1). When it has
started up the Sunny Island goes idle (short interruption) and connects the genera-
tor’s voltage to the island grid by switching the relay “Generator contactor” (K2). Af-
terwards the Sunny Island changes to grid tied operation (“RUN_I”).
Sunny Island
13
14
13
14
N
L
F2
G
L
N
external distribution
generator
Generator
start
Generator
contactor
K1
K2
generator
start
AC-
Outlet
2 A
L
N
PE
L
N
SI-
BPRE
SI-
BPRE
Fig. 3.10:
Connection of a (diesel) generator
Three common options to start diesel generators are described in Chapter 12.