SMA MC-Box 6.3 - Manual (Page 30)

6 Electrical Connection SMA Solar Technology AG
30 MC-BOX-6_12-BE-en-20 Operating Manual
4. Connect Extension Cluster 1 to the circuit breakers F4.4 – F4.6 Ext. Cluster 1.
For the connection of Extension Cluster 1, proceed as described under point 3.
5. Connect Extension Cluster 2 to the circuit breakers F4.7 – F4.9 Ext. Cluster 2.
For the connection of Extension Cluster 2, proceed as described under point 3.
6. Connect Extension Cluster 3 to the circuit breakers F4.10 – F4.12 Ext. Cluster 3.
For the connection of Extension Cluster 3, proceed as described under point 3.
6.3.5 Grounding the Multicluster System
The neutral conductors inside the Multicluster Box are not connected to the grounding conductor by
default. To ensure safe operation of the multicluster system, the following measures must be taken prior
to commissioning:
Cable requirement:
☐ Conductor material: copper
Procedure:
1. Prepare the connection cables (see Section 6.2 "Preparing the Cables", page 24).
2. Connect the grounding conductor to the grounding terminal X5 Equipotential Busbar and
connect it to the grounding busbar.
3. Ground the multicluster system outside the Multicluster Box on either the generator side or the
load side. Connect the neutral conductor to the grounding conductor, observing all standards
and directives applicable at the installation site.