SMA Technologie AG Connecting External Sources
Technical Description SI5048-11:EE4206 Page 97
The following figure principally displays the generator types that can be automatically
started:
If you directly start the generator manually in this operating mode, the Sunny Island
5048 detects the running generator and connects it once the warm up time has expired.
If you stop the generator externally, this is detected and the generator is disconnected
and the stand-alone grid continues to be powered.
GenMan
If a GenMan (generator manager) (SMA order number: "SI-GenMan-...") is integrated
into the system, it assumes direct control of the generator. It is connected between the
Sunny Island 5048 and the generator. The GenMan assumes control of the generator
(warm up time, cooling off time and autostart).
Using the GnReq signal, the Sunny Island 5048 requests the generator at the GenMan
and keeps this signal stable until the request is successful. The GenMan returns the
GENRDY signal via DIGIN (see 6.6 "GenMan Connection" (Page 54)) if the generator
is ready for operation. Afterwards, the Sunny Island 5048 can synchronize and
connect. If the generator is no longer required, the Sunny Island 5048 disconnects itself
and disables the GnReq signal.
With some generator types, the voltage is only switched to the output after the
internal warm up phase is finished. Therefore the time of the generator activation
sequence is monitored internally.
Time to activation = 10 minutes for GenMan or 2 x "#242.10 GnCoolTm" + 2
minutes for manual and autostart.
If the generator is running after being externally started and a generator request
occurs, the GnReq signal is disabled until the generator is externally stopped
again and the stop time has expired.
Generator
PE N L PE N LPE
AC1
AC2
Sunny Island
Relay1
PE
N
L
Inselnetz
PE
N
L
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