Connecting The Pe Cable; Additional Grounding Requirements; Connection Procedure - CanadianSolar CSI-75K-T40001-E User Manual

5 Electrical Connection
* A copper to aluminum adapter terminal is required when an aluminum cable is used.
For details, refer to "5.9.3 Aluminium Cable Requirements".
Table 5-2 PE wire requirements
Phase wire cros PE wire cross
s section S
S＞35 mm² S/2
Table 5-3 Power cable for tracking system
Cable
Power cable for
Outdoor copper
tracking system
conductor cable

5.3 Connecting the PE Cable

Since the inverter is a transformerless inverter, neither the negative pole nor the positive pole of the
PV string can be grounded. Otherwise, the inverter will not operate normally.
Connect the additional grounding terminal to the protective grounding point before AC cable
WARNING connection, PV cable connection, and communication cable connection.
The ground connection of this additional grounding terminal cannot replace the connection of the PE
terminal of the AC cable. Make sure those terminals are both grounded reliably.

5.3.1 Additional Grounding Requirements

All non-current carrying metal parts and device enclosures in the PV power system should be grounded, for example,
brackets of PV modules and inverter enclosure. When there is only one inverter in the PV system, connect the additional
grounding cable to a nearby grounding point.
When there are multiple inverters in the PV system, connect grounding points of all inverters and the PV array frames
to the equipotential cable (according to the onsite conditions) to implement an equipotential connection.

5.3.2 Connection Procedure

Step 1 Prepare the cable and terminal.
Step 2 Remove the screw on the grounding terminal and fasten the cable with a wrench.
Step 3 Apply paint to the grounding terminal to ensure corrosion resistance.
Outer Diamet
section er
12~25mm
Conductor Cross-Secti
Cable Type
onal Area
2 or 3 x 4~10mm²
L2=L1+3mm L1
8.4 ≤ D ≤ 12.5mm
FIG 5-2 Install ground cables
The specifications are valid only when the phase wire and PE
wire use the same material. If otherwise, ensure that the cross
section of PE wire produces a conductance equivalent to that
of the wire specified in the table.
Outer Diameter
12~25mm
L3=2L1
Note
Voltage Level
Consistent with selected AC
cable
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