SMA WB 3300-11 Installation - Manual (Page 28)

Electrical Connection SMA Solar Technology AG
28 WB33-38-IA-IEN120940 Installation Manual
5.3.3 Connecting Additional Earthing
If a second protective conductor, additional earthing or equipotential bonding is required, you can
also earth the inverter on the enclosure.
Overview of additional earthing
Procedure
1. Disconnect the inverter on the AC and DC side as described in Section 7.2 "Opening the
Inverter" (page 48).
2. Align washer, terminal lug with protective
conductor and conical spring washer on cheese-
head screw. The teeth of the conical spring washer
must be facing the metal bracket.
3. Insert the cheese-head screw into the metal bracket
and tighten to a torque of 6 Nm.
4. Check that the contact between the protective conductor and the enclosure is in accordance
with the regulations valid in the country of installation.
Object Description
A Metal bracket on the bottom of the inverter enclosure
B Conical spring washer (included in delivery)
C Terminal lug (M6) with protective conductor
D Washer
E M6x12 cheese-head screw (included in delivery)