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SMA Solar Technology AG
6.2.2
Connecting the Inverter to the Utility Grid
Requirements:
☐ All electrical installations must be carried out in accordance with the local standards and the
National Electrical Code
☐ The connection requirements of the grid operator must be met.
☐ The grid voltage must be within the permissible range. The exact operating range of the
inverter is specified in the operating parameters.
Procedure:
1. Disconnect the AC circuit breaker and secure it against reconnection.
2. Remove the adhesive tape from the enclosure opening for the AC connection.
3. Insert the conduit fitting into the opening and tighten from the inside using the counter nut.
4. Attach the conduit to the conduit fitting.
5. 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.
6. 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)).
7. 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)).
8. Ensure that the terminal block is securely in place and the screws are tightened.
9. Strip off the conductor insulation of L1, L2 and, if applicable, N by 18 mm (0.71 in) each.
10. In the case of fine stranded wire, provide the conductors with a bootlace ferrule.
Installation Manual
®
ANSI/NFPA 70 or the Canadian Electrical Code
5
/
in))
32
6 Electrical Connection
®
CSA C22.1.
1
2
SBxx-1SP-US-41-IA-xx-10
33
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