SMA SUNNY BOY 3.8-US Instructions D'installation page 33

SMA Solar Technology America LLC
6. Guide the conductors from the conduit into the inverter. In the process, install the conductors in
the inverter such that they do not come into contact with communication cables, the cable of
the LED assembly or other live conductors. Lay the conductors as a loop if they are too long.
7. Connect the equipment grounding conductor of the utility grid to the equipment grounding
terminal:
• Strip the insulation of the equipment grounding
conductor by 18 mm (0.71 in).
• Insert the screw through the spring washer, the clamping bracket and the washer.
• Guide the equipment grounding conductor between the washer and clamping bracket
and tighten the screw with a Torx screwdriver (TX 25) (torque: 6 Nm ± 0.3 Nm
(53.10 in-lb ± 2.65 in-lb)).
8. Plug the terminal block for the AC connection in the
AC-out slot in the inverter, and tighten it with a flat-
blade screwdriver (blade width: 4 mm (
(torque: 0.3 Nm (2.65 in-lb)).
9. Ensure that the terminal block is securely in place and the screws are tightened.
10. Thread the conductors L1, L2 and N through the ferrite.
11. Strip off the conductor insulation of L1, L2 and N by 18 mm (0.71 in) each.
12. In the case of fine stranded wire, provide the conductors with a bootlace ferrule.
Connection of conductors of finely stranded wire
13.
To connect conductors made of finely stranded wire, each terminal point must be opened.
• First insert the connector into the terminal point all the way to the lock (round
opening). Then insert a flat-blade screwdriver (blade: 4 mm (
go into the actuation shaft (rectangular opening). Hereby the lock opens and the
conductor can be placed into the terminal point as far as possible. After the
connection has been made, the flat-blade screwdriver must be pulled out of the
actuation shaft.
14.
Fire hazard due to faulty conductor connection
If the conductors are inserted into the actuation shafts (right-angled openings), a fire may
occur during inverter commissioning.
Installation Manual
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WARNING
SBSxx-US-10-IA-xx-11
6 Electrical Connection
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