SMA MULTICLUSTER BOX 36 - Manual (Page 33)

SMA Solar Technology AG 7 Electrical Connection
Operating Manual MC_BOX_36-BE-en-20 33
• Connect the master to the terminals
Main Cluster Master as follows:
– Connect the line conductor to the
terminal 1 :L1.
– Connect the neutral conductor to the
terminal 2 :N.
– Connect the grounding conductor to the
terminal 3 :PE.
5. Connect the Sunny Island inverters of the extension cluster as described under point 4. Begin
with slave 2 of extension cluster 1 and observe the labels on the terminals.
6. Bundle the connection cables with cable ties above the double-membrane seal. This helps
relieve tension at the terminals.
7. Reinsert the cover of the Sunny Island connection area.
8. Insert the four screws into the cover of the Sunny Island connection area and fasten them
hand-tight.
7.9 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 requirements:
☐ Conductor material: copper
☐ Maximum conductor cross-section: 300 mm²
Procedure:
• 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.