Connecting The Strings To The Connection Unit - SolarEdge SE66.6KUS Installation Manual

7. Crimp the lugs on the AC wires.
CAUTION!
Only use compression lugs of the one -hole standard barrel 600v type . Do not use
mechanical lugs (chair lugs) as they may pose a safety risk.
NOTE
The following are the requirements for the Lugs:
Bolt hole size: M* (5/16").
l
Compression lugs only (no m echanical lugs).
l
Compression lugs of the one-hole, standard barrel, 600v type.
l
4/0 lugs shall be of the narrow tongue type
l
Maximum wire size: 4/0 AWG
l
Maximum lug tongue thickness: 0.16"
l
Maximum lug tongue width: 0.9"
l
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.
10. Tighten the screws of each terminal with a torque of 15.0 N*m
Wire type
Line 1
Line 2
Line 3
Neutral
11. 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.
-Three Phase Inverter with Synergy Technology Installation MAN-01-00402-1.4
Chapter 4: Connecting the AC and DC Strings to the Connection Unit
Connect to terminal
L1
L2
L3
N
Figure 30: Wire connections to terminal block
39