Sunny Island
Installation & Operating Instructions
BWRI33-12:EE
- 90 -
SMA Regelsysteme GmbH
•
Under “712_K1 On t1“ define the battery state which has to be reached to
make the Sunny Island switch on relay K1.
•
Under “713_K1 Off t1“ define the battery state which has to be reached to
make the Sunny Island switch off relay K1. Depending on the device you want
to control with this relay it can make sense to define a higher or a lower bat-
tery state.
The fact whether the battery state for switch-on is higher or lower than
the battery state for switch-off determines when a relay is actually
switched.
As shown in Fig. 8.10 there are two different modes: “Consumer type“
(switch-on limit if battery state is above switch-off limit) and “Feeder type“
(switch-on limit if battery state is below switch-off limit). If the same bat-
tery state is set for both the switch-on and the switch-off limits the relay
is controlled as for the “Consumer type“.
•
If the same values have been entered under the parameters “710_K1 t2 be-
gin“ and “711_K1 t2 end“ a simple setting to a battery state-dependent control
of this relay has already been finished. Often, however – especially in island
grids supplied by PV – an operating mode is desired where the devices are
controlled depending on the battery state, but additionally also depending on
the time of the day. To this end it is possible to define a second time period
(“special time period t2“, from “710_K1 t2 begin“ to “711_K1 t2 end“). For this
second period, battery states for switching of the relay can be selected again.
The setting is made accordingly as described above, but with the parameters
“714_K1 On t2“ and “715_k1 Off t2“.
•
To activate the battery state-dependent relay control the parameter “701_Man
K1“ has to be set to “AUTO“.
