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Identification: MD-AL-GI-00
Rev. 1.1 of 12/03/2021 - Application: GID
User’s Manual 1PH 1100TL-3300TL-V3
Rev. 1.1 12/03/2021
Note:
For safety reasons, make sure to use suitably sized cables, otherwise the current may cause
overheating or overloading, which could result in a fire.
Figure 23 – Do not connect loads between the inverter and circuit breaker
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
fact, excessive impedance could cause an increase in the AC voltage, which
in turn may cause the inverter to disconnect from the grid. 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 the 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.
