SUNNY ISLAND 5048 - Technical Description - Wind & Sun Ltd.

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Connecting External Sources SMA Solar Technology AG 14.3 Generator and Grid In addition to the power distribution grid, a generator can also be integrated into a stand-alone grid system as a secondary protective measure. This is particularly useful in case of long-term grid failures, even if the battery size is no longer sufficient to bridge the failure after a period of time. The common solution in such cases is using a transfer switch, which can be purchased as a manual or automatic switch. By using such a switch, a diesel generator is connected to the AC2 connection, to which the power distribution grid is normally connected, as displayed in the figure below: To use such a switch, carry out the installation as follows. NOTICE! Destruction of the Sunny Island due to abrupt switch from power distribution grid to generator and vice versa. • If an automatic switch is installed, make sure that it completely disconnects the Sunny Island from the grid and from the generator for at least 5 seconds. • If a manual switch is installed, leave the switch in OFF-position for at least 5 seconds before switching to the new position. • Upon request to the SMA Serviceline, you can obtain the manual on how to install a switch for connecting the Sunny Island to the power distribution grid and to a generator. 1. Connect the negative pole of the DigIn connection on the Sunny Island to the negative pole of the BatVtgOut connection, also located on the Sunny Island. 2. Connect the positive pole of the DigIn connection to a NO connection of an auxiliary contact of the transfer switch. 128 SI5048-TB-TEN110340 Technical Description
SMA Solar Technology AG Connecting External Sources 3. Connect the positive pole of the BatVtgOut connection to the second contact of the same auxiliary contact on the transfer switch. An auxiliary contact is used because the Sunny Island must "know" whether it is connected to the power distribution grid or whether it must manage a diesel generator. To enable such a kind of operation, you must set the "231.05 ExtSrc" parameter to "GenGrid" (see section 8.2 ”Starting the Quick Configuration Guide (QCG)” (page 57)). Settings performed on the generator and grid All the settings made for the generator and grid in the submenus also apply to the "GenGrid" selection. Technical Description SI5048-TB-TEN110340 129
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Off-Grid Inverter SUNNY ISLAND 5048
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Table of Contents SMA Solar Technol
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Notes on this Manual SMA Solar Tech
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The Sunny Island 5048 SMA Solar Tec
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Safety Instructions SMA Solar Techn
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Mounting SMA Solar Technology AG 4
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Mounting SMA Solar Technology AG 4.
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Opening and Closing SMA Solar Techn
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Electrical Connection SMA Solar Tec
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Control Elements SMA Solar Technolo
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Initial Start-up SMA Solar Technolo
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Switching On and Off SMA Solar Tech
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Switching On and Off SMA Solar Tech
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Operation SMA Solar Technology AG 1
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Operation SMA Solar Technology AG O
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Operation SMA Solar Technology AG I
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Parameter lists SMA Solar Technolog
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Troubleshooting SMA Solar Technolog
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Accessories SMA Solar Technology AG
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Technical Data SMA Solar Technology
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Contact SMA Solar Technology AG 23
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