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5 Electrical Connections
Before performing any electrical connections, ensure that both DC
and AC Switches are OFF. Otherwise, fatal injury can occur due to
the high voltage caused from AC and DC cables.
CAUTION
DANGER
Grounding the PV Strings needs below prerequisites:
An isolation transformer must be installed on the AC side of each inverter;
Ensure that the neutral wire of the isolation transformer must be disconnected from the
PGND cable.
One isolation transformer is with one PV inverter: do not install a single isolation transformer
for multiple inverters; otherwise, circulating current generated by the inverters will lead to
operation failure.
Select Isolation SET on the mobile APP, and set in Input Grounded, With TF.
The ground cable and OT terminals have been prepared.
a. Ground cable: Outdoor copper-core cables with a cross sectional area of 4 mm or more are
recommended.
b. OT terminal: OT6~4.
5.1 Connecting Protection Ground (PGND) Cables
5.1.1 Preparation
Key parameter
Product series code
Terminal product series code
NOTE
Good grounding for the inverter helps resist the impact of surge
voltage and improve the EMI performance. Connect the PGND cable
before connecting the AC power cables, DC power cables, and
communication cables.
OT 6 4
~
2
Summary of Contents for GT1-3K-S
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