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Identification: MD-AL-GI-00
Rev. 4.0 of 31.01.18 - Application: GID
Manual of 07/06/2019 Rev. 2.1 “User Manual for 1.1K-3K TL”
The maximum open-circuit voltage of the photovoltaic string must be less than 500 V.
The 1.1K-3K TL series has only one independent input channel (MPPT). All the
photovoltaic modules connected to it must be of the same model so as to have the
same rated electrical characteristics (Isc, Voc, Im, Vm, Pm and temperature
coefficients) and be positioned in the same orientation (solar azimuth and inclination
angle).
Note
4.1.
Electrical connections
Figure 13 – Steps for connecting the cables
4.2.
Ground cable connections (PGND)
Connect the 1.1K-3K TL inverter to the ground electrode using ground protection cables (PGND).
The inverter does not have a transformer, therefore the positive pole and
negative pole of the photovoltaic string does 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
Prerequisites:
Prepare the PGND cables to be connected (outdoor power cables with a cross-section of 4 mm
2
are
recommended for grounding purposes). It is recommended to use yellow-green cables for better
identification.
Procedure:
1)
Remove an adequate length of the external insulation layers using a wire stripper, as shown in figure 14.
Note:
L2 is approximately 2-3 mm longer than L1
