KACO blueplanet 1502xi - Manual (Page 45)

Page 42 42 31000770-02-112609 blueplanet Operating and Installation Instructions 1502xi - 5002xi
8.2 Installation with multiple inverters on a
three phase system
Observe the following regarding installations with multiple
inverters on a three phase system:
Asymmetric grid-feed:
The power should be distributed as equally as possible over
the three phases. In the US, typically the asymmetry between
the phases may be a maximum of 6 kW (This number can vary
depending on utility transformer size and codes).
Figure 8.2: Three phase grid connection for
installations with multiple inverters
Electrical connection:
The blueplanet feeds only on two phases. In order to avoid
asymmetries on a 3 phase grid, installations with multiple
inverters should be designed so that the inverters feed into
the grid in differing phases. The inverter feeds into the con-
nections labelled L1 and L2. If you have multiple inverters,
connect the actual phases L1 and L2 to terminals L1 and L2 on
the first unit. On the second unit, connect phases L2and L3 to
terminals L1 and L2. On the third unit, connect phases L3 and
L1 to terminals L1 and L2. Continue as above. This distributes
the power optimally.
Section 8 · blueplanet as Part of a PV Installation