ABB PVS300 Manual Pagina 47

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Planning the installation 47
Split phase TN and TT type grids
The following diagrams show three PVS300 solar inverters connected to split phase
TN and TT grids. In a split phase TN or TT type grid, the voltage seen by each
PVS300 inverter is the line-to-line voltage. The allowed line-to-line RMS voltages are
208, 220, 230 and 240 V. The following table shows the different line-to-earth
voltages for split phase TN or TT type grids.
Connection diagram for split phase TN type grid
Connection diagram for split phase TT type grid
Line-to-line voltage
(V
RMS
)
Line1-to-earth
voltage (V
RMS
)
Line2-to-earth
voltage (V
RMS
)
Line3-to-earth
voltage (V
RMS
)
208 104 104 180
220 110 110 190
230 115 115 199
240 120 120 208
L1
L
N
PE
L
N
PE
L
N
PE
L3
L2
Earth
230 V
1
1
5
V
2
3
0
V
1
1
5
V
1
9
9
V
L1
L
N
PE
L
N
PE
L
N
PE
L3
L2
Earth
230 V
1
1
5
V
2
3
0
V
1
1
5
V
Earth
1
9
9
V
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