SMA Sunny Island 4248U, Installation & Operating Instructions Manual

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Commissioning SI4248U Manual
44
Release:
The Sunny Island contains circuitry that prevents power from being fed back into the
generator. If this condition is detected by the Sunny Island, it shuts off the generator and then
locks the generator out for 20 minutes. This 20 minute wait time can be cancelled by selecting
Release.
GridConnected
The GridConnected parameter tells the Sunny Island if there is a utility grid present and if so,
what role it will play. It also tells the Sunny Island wether the power source connected to the
AC input is a generator or the utility grid. It has three possible settings: GridNone, GridCharge
and GridFeedPV.
GridNone: Set GridConnected to GridNone if there is a generator connected to the AC input
of the Sunny Island.
GridCharge:
Set GridConnected to GridCharge when the utility grid is connected to the AC
input of the Sunny Island.
NOTE: When setting GridConnected to GridCharge, make sure that GenControl
is set to Manual and that GenOperation is set to Auto.
GridFeedPV:
Use the GridFeedPV setting when grid connected Sunny Boys are present in the
system.
NOTE: When selecting GridFeedPV, make sure that GenControl is set to Manual
and that GenOperation is set to Auto.
Generator Status Displays
The Sunny Island 4248U display a variety of symbols to indicate the status and quality of the
power being produced as well as the condition that caused the generator to start. Refer to the
following two tables for details.
Table 1-11: Generator Power Quality Icons
Icon Description
* Indicates that the generator input voltage and frequency are within the
limits set by parameters 24-4 to 24-8
? Indicates that the generator input voltage and frequency are outside of
the limits set by parameters 24-4 to 24-8
! The maximum reverse power limit as determined by the value of PGen-
Reverse has been exceeded and the generator function locked out for
20 minutes.