SMA MC-Box 6.3 - Manual (Page 26)

6 Electrical Connection SMA Solar Technology AG
26 MC-BOX-6_12-BE-en-20 Operating Manual
6.3.2 Connecting the Loads
The line conductors L1, L2 and L3 are routed via a fuse switch-disconnector in the Multicluster Box.
Fuse links with a nominal current of 80 A (Multicluster Box 6.3) or 160 A (Multicluster Box 12.3) are
installed ex works. The fuse switch-disconnectors are required to protect the output cables from
overload in stand-alone grid operation. Note that the currents of the Sunny Island inverters,
the PV system and the generator can add up.
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 and N to the terminal X2 Loads as labeled. The second
terminal N is not used.
3. Connect L1, L2 and L3 to the fuse switch-disconnector F2 Loads as labeled.
4. According to the type of cable routing and the installation conditions, determine the required
fuse link for the fuse switch-disconnector and insert it in the fuse holder.