7 Electrical Connection
SMA Solar Technology AG
Operating manual
SHP-US-20-BE-en-10
34
3. When using a self-assembly network cable, assemble the RJ45 connectors and connect them
to the network cable (see connector documentation).
4. For each cable attach a conduit fitting for attachment of the conduits to the connecting plate.
5. Lead each cable through a conduit fitting in the connection plate up to the network jacks. Lay
each cable according to the installation plan and attach to the brackets.
6. Put the RJ45 plug of the cable into one of the
network sockets of the communication assembly.
7. Ensure that the RJ45 plug is securely in place by pulling slightly on the cable.
8. If the inverter is installed outdoors, install overvoltage protection for all components in the
network.
9. Either connect the other end of the network cable directly to the local network (e.g. via a
router) or connect all present inverters in the system to each other in line topology and connect
the first or last inverter in the line to the local network.
7.4
Connecting the PV Array
NOTICE
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.
DC cable requirements:
☐ Aluminum or copper cables must be used.
☐ Cable cross-section: 95 mm² to 300 mm² (600 kcmil to 3/0 AWG)
☐ The cables must be equipped with terminal lugs.
Requirements:
☐ One PV combiner box must be available.
☐ The DC cables have been inserted into the product.
Содержание SHP 125-US-20
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