SMA MULTICLUSTER BOX 36 - Manual (Page 27)

SMA Solar Technology AG 7 Electrical Connection
Operating Manual MC_BOX_36-BE-en-20 27
7.6 Connecting the Loads
The line conductors of the loads are routed via the fuse switch in the Multicluster Box. The fuses are
necessary to protect the output cable from overloads. 500 A LV/HRC size 3 fuse links are installed
in the fuse switch by default.
Cable requirements:
☐ Conductor material: copper
☐ Maximum conductor cross-section: 300 mm²
☐ Line conductors, neutral conductors and grounding conductors must have the same
cross-section.
Procedure:
1. According to the type of cable routing and the installation conditions, determine the required
fuse link for the fuse switch. Observe the following requirements:
– Permitted fuse rating: 100 A to 500 A
– The currents of the Sunny Island, the PV plant and the generator can add up.
2. Insert the connection cables in the Multicluster Box and prepare (see Section 7.4, page 24).
3. Throw the handle on the fuse holder down.
4. With both hands, lift the fuse holder up and out of the anchorage.
Cable protection
The Multicluster Box does not replace the distribution board for the loads. Between the
Multicluster Box and the loads, you must install a distribution board with circuit breakers to
protect and isolate the loads, as well as a residual-current device. Make sure to observe
all standards and directives applicable at the installation site.