SMA MULTICLUSTER BOX 36 - Manual (Page 31)

SMA Solar Technology AG 7 Electrical Connection
Operating Manual MC_BOX_36-BE-en-20 31
7.8 Connecting the Sunny Island Inverters
Assignment of the Terminals
The following table describes how the terminals are assigned and labeled.
Cable requirements:
☐ Conductor material: copper
☐ Conductor cross-section: 6 mm² to 10 mm²
Procedure:
1. Insert the connection cables into the Multicluster Box (see Section 7.4, page 24).
Label the cables using the adhesive web included in the delivery.
2. Release the four screws on the cover of the Sunny Island connection area.
Cable protection
Each Sunny Island connection cable is fused with a C40 A circuit breaker.
Optimum mounting location
The ambient temperature of the Multicluster Box influences the tripping threshold of the
circuit breakers for the Sunny Island inverters. The higher the temperature, the earlier the
circuit breakers will trip. At high ambient temperatures, the derating function of the
Sunny Island inverters inhibits premature tripping of the circuit breakers.
• To ensure optimum operation, mount and install the Multicluster Box and the
Sunny Island inverters at the same location.
Top-hat rail for
Sunny Island Main cluster Extension cluster 1 … Extension cluster 11
Upper top-hat rail for
master 1 :L
2 :N
3 :PE
10:L
11:N
12:PE
… 100:L
101:N
102:PE
Middle top-hat rail for
slave 1 4 :L
5 :N
6 :PE
13:L
14:N
15:PE
… 103:L
104:N
105:PE
Lower top-hat rail for
slave 2 7 :L
8 :N
9 :PE
16:L
17:N
18:PE
… 106:L
107:N
108:PE
Sunny Island layout in a stand-alone grid
• All masters are assigned to line conductor L1.
• All slaves 1 are assigned to line conductor L2.
• All slaves 2 are assigned to line conductor L3.
This creates a right-hand rotating magnetic field in the stand-alone grid.