SMA SI 3.0-11 Installation - Manual (Page 52)

7 Electrical Connection SMA Solar Technology AG
52 SI30M-44M-60H-80H-IA-en-30 Installation Manual
11. Use an Allen key (AF 5) to fasten the DC– cable to the DC–
connection with an M8x20 screw (torque: 12 Nm). Be sure to
adhere to the following screw assembly: screw head | spring
washer | fender washer | terminal lug | DC connection.
☑ The entire contact surface of the fender washer is in contact
with the terminal lug.
12. Tighten the swivel nuts of the cable glands (torque 4.5 Nm).
7.5.2 Connecting the AC Power Cable
Always proceed as follows to connect the power cables.
Cable requirements:
☐ Copper wire
☐ Conductor cross-section: maximum 16 mm²
☐ Cable diameter: 9 mm to 18 mm
:$51,1*
Danger to life from electric shock due to incorrect connection of the neutral conductor
The neutral conductor of the external energy source is firmly connected to the neutral conductor of the Sunny Island
inverter on connection AC2 Gen/Grid N. Upon disconnection of the external energy source, the Sunny Island only
disconnects the line conductor on connection AC2 Gen/Grid N. The Sunny Island disconnects all poles from the
external energy source on connection AC2 Gen/Grid N
TT
. If the neutral conductor is incorrectly connected on
connection AC2, the protective functions in the system can fail. This can result in death or serious injury.
• Always connect the neutral conductor to the connection AC2 Gen/Grid N
TT
in systems for increased
self-consumption.
• Always connect the neutral conductor to the connection AC2 Gen/Grid N
TT
in battery backup systems.
• Always connect the neutral conductor of the generator to the connection AC2 Gen/Grid N in off-grid systems.