3 connecting additional grounding, Connecting additional grounding – SMA SB 3300-11 Installation User Manual
Page 28
Electrical Connection
SMA Solar Technology AG
28
SB33-38-11-IA-en-62
Installation Manual
5.3.3 Connecting Additional Grounding
If a second protective conductor, additional grounding or equipotential bonding is required,
you can additionally ground the inverter on the enclosure.
Overview of the Additional Grounding
Procedure
1. Disconnect the inverter from the AC and DC side as described in section 7.2 "Opening the
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 shackle.
3. Plug the cheese-head screw into the metal shackle
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 for the country of installation.
Object
Description
A
Metal shackle on the bottom of the inverter enclosure
B
Conical spring washer (included in the scope of delivery)
C
Terminal lug (M6) with protective conductor
D
Washer
E
M6x12 cheese-head screw (included in the scope of delivery)