Connecting The Pv Array - SMA SUNNY TRIPOWER 12000TL-US Instructions D'installation

6 Electrical Connection
☐ The thresholds for the input voltage and the input current of the inverter must be adhered to
(see Section 14 "Technical Data", page 72).
☐ The maximum input current per string must be maintained (see Section 14 "Technical Data",
page 72).
Additionally required material (not included in the scope of delivery):
☐ Depending on the number of strings, one or two conduits made of metal: 25.4 mm (1 in)
☐ Depending on the number of conduits, one or two rain-tight conduit fittings for wet locations
complying with UL 25.4 mm (1 in)
☐ For closing unused enclosure openings for the DC connection: UL-listed type 3R filler plugs
Cable requirements:
☐ The DC cables must be approved for temperatures of over +90°C (+194°F).
☐ The maximum cable length subject to conductor cross-section must be observed.
☐ Conductor type: copper wire
☐ Only use solid wire or stranded wires.
☐ Conductor cross-section: 10 mm² to 35 mm² (8 AWG to 2 AWG)
☐ The DC cables must be sized in accordance with the installation requirements applicable on
site.
6.4.2

Connecting the PV Array

Damage to the inverter due to ground fault on DC side during operation
Due to the transformerless topology of the product, the occurance of ground faults on DC side
during operation can lead to irreparable damage. Damages to the product due to a faulty or
damaged DC installation are not covered by warranty. The product is equipped with a protective
device that checks whether a ground fault is present during the starting sequence. The product is
not protected during operation.
• Ensure that the DC installation is carried out correctly and no ground fault occurs during
operation.
Requirements:
☐ A means of disconnecting the inverter from the PV array must be present.
☐ The grounding of the PV system must be executed as per the specifications of the National
®
Electrical Code
ANSI/NFPA 70 and is the responsibility of the installer.
☐ All electrical installations must be carried out in accordance with the local electrical standards
and the National Electrical Code
C22.1.
34 STPTL-US-10-IA-xx-22
NOTICE
®
ANSI/NFPA 70 or the Canadian Electrical Code
SMA Solar Technology America LLC
Installation Manual
®
CSA