KACO blueplanet 1502xi - Manual (Page 37)

blueplanet Operating and Installation Instructions 1502x - 2502x Page 39
blueplanet as Part of a PV Installation
7.2 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 29: Three phase grid connection for installa-
tions 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 connections labelled L1 and L2. If you
have multiple inverters, connect the actual phases L1 and L2 to terminals L1 and L2 on the fi rst 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.