SMA SB3.0-1SP-US-40, Installation Manual, Page: 33 / 236

6 Electrical Connection SMA Solar Technology AG
Installation Manual SBxx-1SP-US-40-IA-xx-15 33
• Disconnect the ribbon cable from the socket on
the communication assembly. During the first
installation, the ribbon cable is to be connected
only to the assembly on the enclosure lid of the
Connection Unit.
4. Remove the adhesive tape from the enclosure opening for the AC connection.
5. Insert the conduit fitting into the opening and tighten from the inside using the counter nut.
6. Attach the conduit to the conduit fitting.
7. 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.
8. 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 (TX 25) (torque: 6 Nm ± 0.3 Nm (53.10 in-lb ± 2.65 in-lb)).
9. 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 (
5
/
32
in))
(torque: 0.3 Nm (2.65 in-lb)).
AC-out
SPS
1
L1
L2 N
2
10. Ensure that the terminal block is securely in place and the screws are tightened.
11. Strip off the conductor insulation of L1, L2 and, if applicable, N by 18 mm (0.71 in) each.
12. In the case of fine stranded wire, provide the conductors with a bootlace ferrule.
ENGLISH