SMA SMC 4600A Installation - Manual (Page 25)

SMA Solar Technology AG Electrical Connection
Installation Manual SMC46-60A11-IA-en-81 25
9. Screw the swivel nut firmly onto the cable gland.
10. Secure the enclosure lid using all of the screws and
the corresponding conical spring washers.
Tighten the screws with 6 Nm torque in the order
shown in the figure on the right. The toothing of the
conical spring washers must be facing the
enclosure lid.
The scope of delivery of the inverter includes a
spare screw and conical spring washer.
☑ The inverter is connected to the electricity grid (AC).
5.2.3 Additional Earthing of the Enclosure
If the installation so requires, you can use the earth terminal to connect a second protective conductor
or as equipotential bonding.
Procedure
1. Plug the stripped earthing cable (D) under the
clamping bracket (C) (max. cross-section 16 mm²
or with bootlace ferrule max. 10 mm²).
2. Screw the clamping bracket tight using the screw
(A) and conical spring washer (B).
The toothing of the conical spring washer must face
toward the clamping bracket.
☑ The inverter enclosure is additionally earthed.
DANGER!
Danger to life due to enclosure lid carrying voltage
The earthing of the enclosure lid is ensured by the conical spring washers.
• Attach the conical spring washers for all 6 screws with the toothing facing towards
the enclosure lid.
DANGER!
Danger to life due to high voltages in the inverter
• Do not switch on the miniature circuit-breaker until the PV array has also been
connected and the inverter is securely closed.