Aros SIRIO EASY 1500, Installation And User Manual

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N
OTES FOR THE INSTALLER
T
RANSFORMERS
The inverter contained in this package has been designed to work with LV type TT, TN or TN-S grids.
If the inverter is connected to other types of grid, for example IT grids, contact the manufacturer to check feasibility in the specific
case.
If it should be necessary to use an isolation transformer between inverter/s and the grid, connect the neutral transformer room to
the grounding to ensure inverter operation with the correct distribution systems (TN or TT as previously mentioned).
See the examples in the table below. The numbers shown have the following meaning:
1. No reference point to the neutral grounding: IT system.
2. Galvanic isolation has been violated and measurement errors introduced in the inverter
3. No connection to the neutral point of transformer on the grid side. The three star voltages on the inverter side vary quite
a bit based on the power fed on each phase.
In the event of single phase transformer use, the wiring side connected to the grounding becomes neutral.
Wrong connection Reason for error Correct connection
1
1
2
2
3
2
1
3P 3P+N
GRID
3P 3P+N
GRID
N
3P+N 3P+N
GRID
3P+N 3P+N
GRID
N
3P+N 3P+N
GRID
3P+N 3P+N
GRID
N
3P+N 3P+N
GRID
3P 3P+N
GRID
N
3P 3P+N
GRID
N
3P+N 3P+N
GRID
N
P+N P+N
GRID
P+N P+N
GRID
N
P+N P+N
GRID
P+N P+N
GRID
N