SMA SI 3324 Installation - Manual (Page 75)

SMA Technologie AG Commissioning
Installation Guide SI3324/4248-14:SE2406 Page 75
8.5.1 Selection of Generator Control Method
Use "24-1 GenControl" parameter to select the type of generator to be used in your
system. Three settings are possible:
1. "Manual" Setting (Factory Setting)
"Manual" should be selected when
• no generator is installed in the system (see also section 10.1 "PV Stand-alone
System" (Page 88)) or
• the connected generator can only be manually started (directly at the generator)
(see also section 10.2.1 "Generators with Manual Start" (Page 91)).
As soon as a voltage at the AC input terminals (generator connection) of the Sunny
Island 3324/4248 is within the parameter limits (see parameter 24-2 and 24-4 to 24-
7), the Sunny Island 3324/4248 connects to the generator.
The parameter settings are intended for generators that cannot be automatically
started. Since in these cases the Sunny Island 3324/4248 GenRequest relay is not
used for directly starting the generator, it can here provide a signal transmitter for
the stand-alone grid user.
Possible reasons for a generator request are:
• A request by the battery management (low battery voltage)
• A request by the load-dependent generator management (to handle generator
peak loads)
• A request by the temperature-dependent generator management (to protect the
Sunny Island 3324/4248 against overload)
A signal light can be connected to the "GenRequest" contact that signals the
stand-alone grid user to start the generator when this is required. The signal
light is then switched off again via the "GenRequest" contact when the
generator is no longer needed. Note that, with these settings, although the
signal light has gone out the Sunny Island 3324/4248 will not automatically
disconnect from the generator. You must stop the generator manually.