KACO blueplanet 1502x - Manual (Page 24)

Page 24 blueplanet Installation Instructions 1502x - 5002x
Utility power meter:
The required utility power meter is specified and installed by the responsible power company.
Main circuit breaker:
Contact your utility and check with local and national electrical codes if you have questions concerning the required
main circuit breaker.
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 7.2: 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 7 · blueplanet as part of a PV Installation