Sunny Island
Installation & Operating Instructions
BWRI33-12:EE
- 39 -
SMA Regelsysteme GmbH
Sunny Island
13
14
13
14
N
L
F2
G
L
N
external distribution
Generator
Diesel
start
Diesel
contactor
K1
K2
Generator
start
AC-
outlet
2 A
L
N
PE
L
N
SI-
contactor
K4
24V=
SI-
BP24
2 A
L
N
Grid
L
N
utility grid
13
14
Mains
K3
13
14
K5
L
N
Diesel sync.
input
Sync switch
*
SI-
BPRE
SI-
BPRE
SI-
BPRE-OE
SI-
BPRE
13
14
+
-
Fig. 3.15: Example of an accelerated switch-over (generator and utility)
*
This relay shall not overcharge the 24 V auxiliary supply output (SMA order name ”SI-BP24“)! A relay
complying with the requirements is available with the SMA order name
”SI-BPRETR“.
3.4.9 Connection of a Battery Room Fan and Electrolyte Pump
If lead-acid battery arrays with liquid electrolytes are used as energy stores, the con-
trol of an electrolyte circulation pump is to be connected via the relay terminal K7. A
battery room fan can be controlled via the relay terminal K8. Switch-on and switch-off
criteria can be defined via the menu of the Sunny Island. For wiring see Fig. 3.16.
The switched current of the relays K7 and K8 is a maximum of 5 A at
230 V AC. A detailed limit curve is shown in chapter 18.