Installation Guide
NOTE
The following are the requirements for the Lugs:
Bolt hole size: M* (5/16").
Compression lugs only (no mechanical lugs).
Compression lugs of the one-hole, standard barrel, 600v type.
4/0 lugs shall be of the narrow tongue type
Maximum wire size: 4/0 AWG
Maximum lug tongue thickness: 0.16"
Maximum lug tongue width: 0.9"
8. Apply heat shrink insulation to the lug barrels.
9. Connect the wires to the terminal blocks with a proper tool according to the labels
on the terminals.
Wire type
Connect to
terminal
Line 1 L1
Figure 27: Wire connections to terminal block
Line 2 L2
Line 3 L3
Neutral N
10. Place the cover on the terminal block and push until you hear a click.
Connecting the Strings to the Connection Unit
You can connect systems with multiple DC strings in parallel to the DC input terminals
of the Connection Unit.
NOTE
The DC bus of each unit is separate and not shared for all units. Therefore in addition to following the
inverter design rules, each unit should follow the unit design rules as detailed in Technical
Specifications.
Inverters may have a different number of pairs of DC input terminals, depending on the
inverter power rating. If morestrings are required, they can be connected in parallel
using an external combiner box before connecting to the Connection Unit; strings
Chapter 4: Connecting the AC and Strings to the Connection Unit 47
Three Phase Inverter with Synergy Technology Installation MAN-01-00401-1.5