KACO blueplanet 1502x - Manual (Page 23)

blueplanet Installation Instructions 1502x - 5002x Page 23
Section 7 · blueplanet as part of a PV Installation
7 blueplanet as part of a PV Installation
7.1 Design of installation
A sample design of a grid-connected PV installation using a blueplanet is shown below in the overview circuit diagram.
blue planet Inverter
Main circuit breaker
Circuit
breaker
Utility meter
KWh
PV array PV array
blue planet Inverter
External
DC switch
Circuit
breaker
optional
AC switch
optional
AC switch
External
DC switch
Figure 7.1 Single-line overview circuit diagram
for an installation with two inverters
A summary of the components:
DC terminal point:
Two PV strings can be connected in parallel either at a DC terminal point between the solar generator and the inverter
or directly on the inverter (terminals for three strings are provided on the inverter). Of course, you can also connect the
strings directly to the solar generator and then run just one negative and one positive lead to the inverter. External fusing
may be required, refer local and national electric codes.
External DC switch:
In order to be able to disconnect the inverter on the PV generator side from sources of voltage, use the external DC
disconnect switch.
External AC switch:
In order to be able to disconnect the inverter on the PV generator side from sources of voltage, use the external AC
disconnect switch.
Line overcurrent protection:
In order to protect the wiring, the inverter’s supply leads should be secured with circuit breakers or fuses as appropriate.
The circuit breakers or fuses that are used should be appropriate to the length and cross-section of the wiring and fulfill
applicable standards and directives (5.3: Electrical connection – grid connection).