SMA
Solar Technology AG
Connecting External Sources
Technical Description
SI2012_2224-TEN082311
133
The following figure shows the wiring for a generator capable of autostart:
If the generator is started manually in this operating mode, the Sunny Island detects the generator
running and connects it after the warm-up time. If you stop the generator externally, this is detected,
the generator is disconnected and the stand-alone grid continues to be powered.
After-run
Autostart generators can have an internal after-run which is activated after the request has
been disabled. This can extend the power down time accordingly.
Information
Some generator types connect voltage to the output only after the internal warm-up phase
has been completed. Therefore the time for the generator activation sequence is internally
monitored.
Time for connection = 10 minutes in the case of GenMan and/or 2 x "233.10
GnCoolTm" + 2 minutes for manual and autostart.
Information
If a generator request is made during the generator operation which was started
externally, the GnReq signal is suppressed until the generator is stopped externally again
and the stop time has expired.
Generator
PE N L
PE N L
PE
AC1
AC2
Sunny Island
Relay1
PE
N
L
Island Grid
PE
N
L
Start
