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

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Electrical Connection SMA Solar Technology AG 6 Electrical Connection All cables are fed through the openings on the bottom side of the device (see next illustration) and connected to the appropriate connection terminals on the Sunny Island. Use the provided cable glands to fasten the cables inside the Sunny Island enclosure in a manner conforming to the appropriate standards. The metric thread cable glands guarantee a dust-free and waterproof installation of the cables in the enclosure and also provide strain relief for the cable connection. Close all unused openings in the enclosure using the appropriate filler plugs. Obtain an overview of the different components and connection areas of the Sunny Island, see section 2.2 ”At a glance” (page 18). 30 SI5048-TB-TEN110340 Technical Description
SMA Solar Technology AG Electrical Connection 6.1 Grounding Before commissioning the Sunny Island, it must be externally grounded according to the relevant regulations. To allow different types of grounding, the N connection of the Sunny Island is not connected to PE at the factory. However, since a connection between N and PE is required for correct operation, this must be done outside of the device. Due to filter measures in the Sunny Island, increased leakage currents to PE can always occur. For this reason, a "fixed terminal" of grounding must be implemented according to EN 50178. Ground the Sunny Island with a copper conductor (at least 10 mm² cross-section), or with two separate copper conductors with a cross-section of at least 4 mm² each. External grounding External grounding of the positive or negative pole of the batteries (positive or negative grounding) is generally possible, because the batteries and the grid side are galvanically isolated within the Sunny Island. In this case, make sure that the high currents that may occur under fault conditions can be adequately discharged. Calculating the Required Grounding Cable Cross-section SMA Solar Technology cannot provide generally valid values for the cross-section of the cable required for the external grounding of the battery. The cable dimensions depend on the type and size of the battery connected, the external fuse (DC side) and the material used in the grounding cable. Determining the Cross-section Exact calculation of the grounding conductor cross-section must take account of the regionally applicable standards and guidelines. The required cross-section of a (copper) grounding conductor can be calculated using the following formula. Tripping times for short-circuit currents of between 2,000 A and 10,000 A are typically about 25 ms. t = Interruption time in seconds I SC = Maximum battery current (short-circuit current) in amperes S = Conductor cross-section in mm 2 A grounding conductor of 16 mm² cross-section is thus adequate for short-circuit currents up to 10,000 A. The DC grounding conductors must be connected to the connection labeled "Ground". The grounding conductor is installed in five steps: 1. Loosen the cable gland on the Sunny Island. 2. Thread the grounding conductor through the cable gland. 3. Remove the protective insulation from the conductor and fit a suitable ring terminal lug to the exposed end of the conductor. Technical Description SI5048-TB-TEN110340 31
Page 1: Off-Grid Inverter SUNNY ISLAND 5048
Page 4 and 5: Table of Contents SMA Solar Technol
Page 12 and 13: Notes on this Manual SMA Solar Tech
Page 14 and 15: The Sunny Island 5048 SMA Solar Tec
Page 22 and 23: Safety Instructions SMA Solar Techn
Page 24 and 25: Mounting SMA Solar Technology AG 4
Page 26 and 27: Mounting SMA Solar Technology AG 4.
Page 28 and 29: Opening and Closing SMA Solar Techn
Page 32 and 33: Electrical Connection SMA Solar Tec
Page 54 and 55: Control Elements SMA Solar Technolo
Page 56 and 57: Initial Start-up SMA Solar Technolo
Page 62 and 63: Switching On and Off SMA Solar Tech
Page 64 and 65: Switching On and Off SMA Solar Tech
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Operation SMA Solar Technology AG S
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Operation SMA Solar Technology AG 1
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Archiving Data on a SD Card SMA Sol
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Additional Functions SMA Solar Tech
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Battery Management SMA Solar Techno
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Connecting External Sources SMA Sol
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Relays SMA Solar Technology AG 15 R
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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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SUNNY ISLAND 5048 - Technical Description - Wind & Sun Ltd.

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