7 Electrical Connection
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7.3.2 CT connection
If use the CT, it shall be fitted around the live conductor on the grid side of the main
incoming consumer unit, shown as FIG. 7-3. Use the direction flow indication arrow on
the CT to ensure it is fitted in the correct orientation.
Note: The arrow shall be pointing towards the grid, not the load.
L
N PE
L
N
PE
~
CT
CT/METER
L
N PE
Load
FIG. 7-3 CT Direction
7.4 Cable Description
Cable Name
Cable Type
Conductor
Cross-Sectional Area
Outer Diameter
DC input cable PV cable, above 600V.
4~6mm
2
5.5~7.4mm
AC output cable
Three cores outdoor cable
with copper conductor.
4~6mm
2
10~14mm
Signal cable
Two cores cable.
0.2-0.75mm
2
(24~18AWG) 3.5~5.5mm
PE cable
Single core outdoor cable with
copper conductor.
4~6mm
2
N/A
Note: No cable is supplied.
7.5 Wiring PE Cable
To achieve ground protection purpose, the inverter must be connected to the AC
grounding conductor of the utility grid via PE cable.
Warning
Because of the transformerless design, the DC positive pole
and DC negative pole of PV arrays cannot do grounding.
Note: The PE point at the AC output point is used only as a PE equipotential point, and
cannot substitute for the PE point on the enclosure.
Procedure steps:
1) Insert the grounding conductor into the suitable terminal lug and crimp the contact.
2) Fix terminal lug on external ground point by screw M4x10. Torque: 1.4 N.m.
