Connecting External Sources
SMA
Technologie AG
Page 106
SI5048-11:EE4206
Technical Description
The Sunny Island 5048 charges the generator during each phase using the current
specified in the "#242.03 GnCurNom" parameter. The power that is not directly used
by the loads flows into the battery for charging. The limits for the AC charging current
limit ("#210.02 InvChrgCurMax" parameter) on the Sunny Island 5048 and the DC
charging current limit ("#222.01 BatChrgCurMax" parameter) are active at the same
time. Low values for this limit may be the reason why the defined generator current
cannot be adjusted. If the battery voltage reaches the charging voltage nominal value,
it is also reduced (absorption phase, see section 13.4 "Charge Control" (Page 88)).
If the "#242.15 GnCtlMod" parameter is set to CurFrq, the generator is also limited at
frequencies lower than the nominal frequency ("#242.04 GnFrqNom" parameter). This
function can be used if the full generator output is not always available and you want
to prevent the generator from being overloaded. The default setting is only intended to
control the nominal generator current.
If the current set using the "#242.03 GnCurNom" parameter is not sufficient for
powering the loads, the battery provides support ("real generator support").
The "#230.03 RtCurCps" parameter determines the partitioning of the reactive power
between the Sunny Island 5048 and generator or grid. In the external setting (default),
an attempt is made to provide the full reactive power through the Sunny Island 5048.
In the internal setting, an attempt is made to keep the full reactive power away from the
Sunny Island 5048. The shared setting divides the reactive power between the Sunny
Island 5048 and the generator or grid.
14.1.6 Run Times
If the generator is started (or the Sunny Island 5048 detects an external generator start),
the warm up phase starts. If, during this time, the voltage or frequency detected is not
within the permissible range, the warm up time begins again. If the generator cannot
be connected at the GenMan within twice the time of "#242.12 GnWarmTm" + 2 or
10 minutes, the connection process is cancelled and a new attempt is made. After three
attempts, the system goes into error state (Fail). Once the 5-minute error wait time has
expired, a new attempt is made.
If a slave device disconnects itself from the generator (and the master remains
connected to the generator), the slave device can reconnect itself once the
detected voltage and frequency are back within the valid range. In this case a
monitoring time is running. The slave is only reconnected after the detected
voltage and frequency for the "#242.12 GnWarmTm" parameter are within the
valid range.
A sensible value for the "#242.03 GnCurNom" parameter is approximately 80 %
of the maximum generator current for each phase.
Summary of Contents for Sunny Island 5048
Page 22: ...The Sunny Island 5048 SMA Technologie AG Page 22 SI5048 11 EE4206 Technical Description...
Page 26: ...Safety Instructions SMA Technologie AG Page 26 SI5048 11 EE4206 Technical Description...
Page 94: ...Battery Management SMA Technologie AG Page 94 SI5048 11 EE4206 Technical Description...
Page 114: ...Connecting External Sources SMA Technologie AG Page 114 SI5048 11 EE4206 Technical Description...
Page 160: ...Contact SMA Technologie AG Page 160 SI5048 11 EE4206 Technical Description...
Page 169: ...SMA Technologie AG Glossary Technical Description SI5048 11 EE4206 Seite 169...
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