SMA MULTICLUSTER-BOX 12, Руководство по эксплуатации

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6 Electrical Connection SMA Solar Technology AG
Operating manual MC-BOX-12-3-20-BE-en-13 22
3. Connect the neutral conductor to the spring-cage terminal N at terminal X102:4 (see Section 9.4, page 35).
4. Connect the line conductors to the spring-cage terminals L1 , L2, and L3 at the terminals X102:1 to X102:3 .
5. Ensure that a right-hand rotating magnetic field is present at the generator terminal.
6. Provide for strain relief of the power cables by attaching them to the appropriate cable support rail. Use the strain
reliefs and counter-sleeves provided.
7. According to the type of cable routing and the installation conditions, determine the required fuse link for the fuse
switch-disconnector and insert it into the fuse switch-disconnector F101 .
6.4 Utility Grid Connection
6.4.1 Utility Grid Connection Options
You can connect the utility grid in the following ways:
• Utility grid connection via NA-Box
• Utility grid connection via Grid-Connect-Box
• Utility grid connection directly to the Multicluster-Box
The following conditions must be observed when connecting the utility grid.
Utility grid connection via NA-Box
If the VDE-AR-N 4105 application guide applies to the utility grid (e.g. in Germany and Austria), the NA-Box must be
used (see Section 6.4.2, page 22).
Utility grid connection via Grid-Connect-Box
If the VDE-AR-N 4105 rule does not apply to the utility grid and a generator has to be connected in addition to the
utility grid, a Grid-Connect-Box must be installed between the utility grid and the Multicluster-Box (see Section 6.4.2,
page 22).
Utility grid connection directly to the Multicluster-Box
For direct connection of the utility grid to the Multicluster-Box, the following requirements must be fulfilled:
• The VDE-AR-N 4105 rule must not apply to the utility grid.
• Directly connecting the utility grid to the Multicluster-Box must be permitted in accordance with the local standards
and directives and agreed with the grid operator.
• If the utility grid is directly connected to the Multicluster-Box, no generator is to be installed in the multicluster
system.
To connect the utility grid directly to the Multicluster-Box, terminal X102 of the generator is provided (see
Section 6.1.1, page 19). When connecting the utility grid directly to the Multicluster-Box, proceed as described below
for the generator (see Section 6.3, page 21).
6.4.2 Connecting the NA-Box / Grid-Connect-Box
The grid terminal output fuse influences dimensioning of the PV system power cables
Remember that the size of the grid fuse affects the dimensioning of the PV system cable (see Section 6.6,
page 24).
Requirements:
☐ If using Grid-Connect-Box: The Grid-Connect-Box must be properly installed (see operating manual of the Grid-
Connect-Box).
☐ If using NA-Box: The NA-Box must be properly installed (see operating manual of the NA-Box).