SMA Sunny Island 5048 Installation Instructions Manual page 97

SMA
Technologie AG
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.
The following figure principally displays the generator types that can be automatically
started:
AC1
PE PE N L
PE
N
Inselnetz
L
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.
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.
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.
Technical Description
Sunny Island
AC2 Relay1
PE N L
Connecting External Sources
Start
Generator
L
N
PE
SI5048-11:EE4206 Page 97