View From Below; Deactivating All-Pole Disconnection; Connecting The Multicluster-Box; Cable Requirements - SMA GRID-CONNECT-BOX 12 Instrucciones De Funcionamiento

6 Electrical Connection
6.1.2

View from Below

Figure 8 : Position of the enclosure openings
Position Designation
A Enclosure openings for the control cables
B Enclosure openings for the power cables of the Multicluster-Box
C Enclosure openings for the power cables of the utility grid
6.2

Deactivating All-Pole Disconnection

The technical connection requirements of the grid operator and the local standards and directives specify if the
multicluster system, in the event of grid failure, disconnects from the utility grid at all poles or only the line conductors.
The Grid-Connect-Box is always delivered with all-pole disconnection. If all-pole disconnection is not permitted, the
Grid-Connect-Box all-pole disconnection function must be deactivated. To do this, insert the supplied two-pole N bridge
as follows:
Procedure:
– For use of the Grid-Connect-Box without all-pole
disconnection, connect the spring-cage terminal N on
X301:5 to the spring-cage terminal N on X301:6. Insert the
supplied N bridge into the spring-cage terminals from below.
6.3

Connecting the Multicluster-Box

Cable requirements:

☐ Conductor material: copper
☐ Conductor cross-section: 50 mm² to 150 mm²
☐ The power cables must be ground-fault and short-circuit protected.
☐ Line conductors, the neutral conductor and grounding conductor must have the same cross-section.
☐ The AC conductors and DC conductors must always be routed in separate cables.
Procedure:
1. Insert the power cables into the product (see Section 9.2, page 24).
2. Connect the grounding conductor to the spring-cage terminal PE at terminal X301:7 (see Section 9.3,
page 25).
3. Connect the neutral conductor to the spring-cage terminal N at terminal X301:6.
4. Connect the line conductors to the spring-cage terminals L1, L2 and L3 at terminals X301:8-10.
18 GRID-BOX-12-3-20-BE-xx-12
C
SMA Solar Technology AG
A
B
Operating manual