Operating Manual SB3-5TL-21-BE-en-10 29
SMA Solar Technology AG 6 Electrical Connection
6.3.3 Connecting Additional Grounding
If additional grounding or equipotential bonding is required locally, you can connect additional
grounding to the inverter. This prevents touch current if the grounding conductor at the connecting
terminal plate for the AC cable fails.
Cable requirement:
☐ Grounding cable cross-section: 10 mm² at maximum
Procedure:
1. Strip the grounding cable insulation.
3. Feed the grounding cable under the clamping bracket. Position the grounding conductor on the
left-hand side.
4. Tighten the clamping bracket with the screw and conical spring washer (torque: 6 Nm).
The teeth of the conical spring washer must face the clamping bracket.
2. Loosen the screw using an Allen key (AF 4),
until the grounding cable can be led under the
clamping bracket.
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