Electrical Connection SMA Solar Technology AG
38 SI5048-TB-TEN110340 Technical Description
6.3.3 AC2 (Generator/Grid)
The distribution sub-panel of the generator/power distribution grid is connected to the AC2 output of
the Sunny Island.
The system does not monitor additional fuses. Check any additional fuses regularly!
For connection, proceed as follows:
1. Sheathe the cable gland over the three-conductor cable and then insert the conductor through
the cable opening into the Sunny Island.
2. Install the M25 cable gland (included in scope of delivery) in the "AC2 Gen/Grid" cable feed-
through.
– Insert the cable gland with the thread in the cable opening.
– Screw the counter nut onto the cable gland thread on the inside of the enclosure and tighten.
3. Remove the protective insulation from each of the three conductors.
4. Connect PE to the "AC2 Gen/Grid" according to the label.
5. Connect N and L to the "AC2 Gen/Grid" according to the label.
Single-phase parallel system
In the case of single-phase parallel systems, also connect the generator or the grid to all
slaves on AC2. The AC cables between all Sunny Island and the generator/grid in a
system must have the same size and length.
Distributing loads and AC feed-in generators in multiple-phase systems
Distribute the power of the feeding and loads as well as the AC feed-in generators as
equally as possible on all system phases.
Three-phase system
Always install the master on phase L1, slave 1 on L2 and slave 2 on L3. This installation
has a right-hand rotary field. The AC cables between all Sunny Island and the generator/
grid in a system must have the same size and length.
Cable cross-section
The maximum cable cross-section for connecting the generator is 16 mm
2
.
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