DLS / DLS-C Series
55
Cod.: 240.010.0042
5.3 AC grid connection
See the connection instructions shown in Figure 12.
Make sure to be compliant with the local regulations.
Make sure to be compliant with the grid code of the distribution network operator.
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 connection of multiple inverters to the public grid must comply with current legislation relating to maxi-
mum power imbalance.
The power losses on the GRID IN - GRID OUT line must be less than 1% of the rated power. The indicative
data of the connection are reported below.
Wire cross-section
Line maximum length
DLS 300
DLS 300C
DLS 450
DLS 450C
DLS 600
DLS 600C
2.5 mm
2
8 m - -
4.0 mm
2
13 m 12 m 10 m
6.0 mm
2
23 m 18 m 15 m
Before starting the connection operations, make sure that the external AC line main switch is disconnected
and that the AC GRID and AC OUT circuit breakers are disconnected.
Before starting the connection operations, make sure that the DC line switch is off.
Before starting the connection operations, make sure that the AC BYPASS switch is in the "1" position.
Do not carry out other operations on the inverter for at least 10 minutes. The inverter contains capacitors
that need a minimum time to discharge.
Remove the cover of the connection compartment by removing the screws as shown in Figure 11.
Connect the phase (L), neutral (N) and earth (PE) wires of the AC grid input to the GRID IN terminal block
respecting the correct assignment:
• Phase (L) → L Terminal (GREY)
• Neutral (N) → N Terminal (BLUE)
• Earth (PE) → PE Terminal (YELLOW/GREEN)
Connect the phase (L), neutral (N) wires of the AC grid output to the GRID OUT terminal block respecting
the correct assignment:
• Phase (L) → L Terminal (GREY)
• Neutral (N) → N Terminal (BLUE)
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