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User’s Manual 3PH 10KTL-15KTL-V2
Rev. 1.1 15/03/2021
Identification: MD-AL-GI-00
Rev. 1.1 of 15/03/2021 - Application: GID
E.
Connecting the communication cables
Describes the function of the RS485 ports and the Wi-Fi board and the relative connection methods.
4.1.
Electrical connections
Figure 13 – Steps for connecting the cables
4.2.
Connecting PNGD cables (grounding)
Connect the 3PH 10KTL-15KTL-V2 inverter to the ground electrode using ground protection cables (PGND).
The inverter does not have a transformer, therefore the positive and negative
polarities of the photovoltaic string do NOT need to be grounded. Otherwise, the
inverter may fail. All non-current-carrying metal parts (such as the PV module
frame, PV rack, housing of the combiner box, and housing of the inverter) in the
PV power system must be connected to the ground.
Attention
Note
: Connect the PGND cable before connecting the AC, DC power and communication cables.
For systems with one inverter, connect the PGND cable to the ground. For systems with multiple inverters,
connect the PGND cables of each inverter to the ground electrode using equipotential connections.
If the installation place is near the ground, connect the PGND cable to the ground before installing the
inverter on the wall.
