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Identificazione: MD-AL-GI-00
Rev. 4.0 del 31.01.18 - Applicazione: GID
Manual of 07/06/2019 Rev. 1.1 “User Manual for 20K-33KTL”
Multi-core copper cables
The cross-section of the power line must be sized in order to prevent unwanted
disconnections of the inverter from the grid due to high impedance of the cable
connecting the inverter to the point of supply. In addition, the AC cable must be correctly
sized to ensure that the loss of power on the cable is less than 1% of the rated power and to ensure proper
functioning of the anti-islanding protection. The cable length from the inverter to the grid should not exceed
150 meters.
The figure below shows the relationship between the power loss in the cable, its length and the cross-
section area.
Cross-section of the
cable (mm
2
)
Maximum length (m)
20 KTL
25 KTL
30 KTL
33 KTL
10
34
34
27
27
The 20K-33K TL inverters are three-phase output inverters that comply fully with the local grid connection
requirements and safety standards.
The inverters are equipped with AC output connectors with IP66 protection suitable for photovoltaic use;
customers must provide their own AC output cable connections.
Cable connection procedure
1)
Open the front cover on the bottom of the inverter by removing the four star screws.
Figure 28 – Connecting the AC output cables (1)
2)
Identify the suitable cable section as shown in the table and remove an appropriate length of the
protective sheath, as shown in the figure. Then insert the AC output cable through the waterproof cable
gland.
Figure 29 – Connecting the AC output cables (2)
