7 Electrical Connection
SMA Solar Technology AG
Operating manual
SHP-US-20-BE-en-10
32
7. Connect the grounding conductor to the terminal
as labeled. To do so, position the conductor as far
as it will go into the corresponding terminal and
tighten the screw of the terminal (AF5, torque for a
conductor cross-section of 10 mm² to 50 mm²:
12 Nm; torque for a cable cross-section of
1/0 AWG to 6 AWG: 10 Nm (90 in-lb)).
1
2
8. Connect L1, L2 and L3 to the terminals according to
the label. To do so, position each conductor as far
as they will go into the corresponding terminal and
tighten the screw of the terminal (AF 8, torque for a
conductor cross-section of 50 mm² to 95 mm²:
20 Nm; torque for a cable cross-section of
120 mm² to 150 mm²: 30 Nm; torque for a cable
cross-section of 300 kcmil to 1 AWG: 24 Nm
(216 in-lb)).
1
2
3x
9. Ensure that the correct conductors are assigned to the terminals.
10. Make sure that all conductors are securely in place.
7.3
Connecting the Network Cables
DANGER
Danger to life due to electric shock in case of overvoltages and if surge
protection is missing
Overvoltages (e. g. in the event of a flash of lightning) can be further conducted into the building
and to other connected devices in the same network via the network cables or other data cables
if there is no surge protection. Touching live parts and cables results in death or lethal injuries due
to electric shock.
• Ensure that all devices in the same network are integrated in the existing overvoltage
protection.
• When laying the network cable outdoors, ensure that there is suitable surge protection at
the network cable transition from the product outdoors to the network inside the building.
• The Ethernet interface of the inverter is classified as "TNV-1" and offers protection against
overvoltages of up to 1.5 kV.
Summary of Contents for SHP 125-US-20
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