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Cod.: 240.010.0042
DLS / DLS-C Series
5 ELECTRICAL CONNECTIONS
5.1 Cautions
The installation must be carried out only by experienced staff.
Refer to Figure 02 to identify the switch geras of the DLS inverter.
Refer to Figure 03 to identify the connection terminals of the DLS inverter.
Refer to Figure 04 for the installation wiring diagram of DLS inverter relying on internal energy me-
ter.
Refer to Figure 05 for the installation wiring diagram of DLS inverter relying on external energy me-
ter.
Refer to Figure 06 for the installation diagram of DLS inverter in off-grid conguration.
Refer to Figure 07 for the installation diagram of DLS inverter in AC hybrid conguration relying on
internal energy meter.
Refer to Figure 08 for the installation diagram of DLS inverter in AC hybrid conguration relying on
external energy meter.
For safety reasons, an appropriately rated input load disconnector must be provided for each individual
DLS. No load should be connected directly to the DLS inverter.
The DC disconnector of the PV input lines is integrated. The disconnector of the battery lines is also in-
tegrated and automatic. It is normally managed by the system control, but it can be voluntarily controlled
by turning the AC BYPASS switch to the "1" position in cases of maintenance/malfunction which require
disconnection of the battery from the system.
WARNING: Local regulations in force in the country of installation may require the installation of an external
additional DC disconnector for the PV input lines and an external additional DC breaker switch for the po-
sitive and negative lines of the battery. Both devices must be rated according to the maximum voltage and
current values specied in the technical data of the DLS.
DLS systems are equipped with a Residual Current Monitoring Unit compliant with the requirements of the
IEC / EN 62109-2: 2011 safety standard (refer to paragraph 4.8.3.5 of the Standard). They are equipped
with a redundancy on the earth leakage current sensitive to all components of the current, both direct and
alternating. The measurement is carried out simultaneously by two different processes: it is enough that
only one of the two detects a fault to disconnect the converter from the network.
It must be noted that the device integrated in the converter protects the system against the faults only
occurring upstream of the inverter AC terminals (i.e. from the inverter to the photovoltaic modules). The
leakage currents that can occur in the AC section between the PCC (Point of Common Coupling) and the
DLS are not detected. If, in compliance with local regulations or specic cases, the use of an external
RCD is necessary, it is recommended to use a type A protection RCD with a fault current of at least
100mA.
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