KACO blueplanet 1502x - Manual (Page 19)

blueplanet Installation Instructions 1502x - 5002x Page 19
Section 5 · Installation and Start-Up
!
DANGER
Risk of electric shock at live connections.
Check that the power lead is voltage-free before inserting it
into the inverter
! WARNING
To reduce the risk of fire, connect only to a circuit provided
with the required branch-circuit overcurrent device sized in
accordance with the National Electrical Code, ANSI/NFPA 70.
The maximum size overcurrent device shall not be more than
15 A for the 1502x, 20 A for the 2502x, 25 A for the 3502x and
and 30 A for the 5002x.
NOTE
Be sure to use cables with a sufficiently large cross-
section to avoid excessive line impedance between
the building’s distribution box and the respective
blueplanet unit.
When the line impedance is high, i.e. long AC-side
leads, the voltage at the line terminals of the inverter
will increase as power is being fed in to the grid. The
inverter measures this voltage. If the voltage at the
grid terminals exceeds the line overvoltage limit, the
inverter will switch off due to line overvoltage. This
condition must be taken into consideration when
wiring the AC and dimensioning the AC lead.
!
CAUTION
Check that the leads are properly connected.
ACTION
Once again, ensure that all connected leads are firmly
connected.
PV generator connection
The PV generator leads are connected on the left side
of the inverter.
5.7 Interfaces
All interfaces are connected on the communication circuit
board.
Figure 5.14: Communication circuit board with
highlighted RS485 termination switch
Figure 5.15: Interface terminals
(A) Connecting the fault signal relay
The inverter is equipped with a potential-free relay con-
tact to signal faults. This contact closes if a fault occurs.
The contact is designed as a NO contact and marked
as “ERR” on the circuit board. Maximum contact load
• DC: 30 V / 3 A.
• AC: 250 V / 1.5 A.
IMPORTANT
In the event of failure of the grid-feed phase (power
failure on the public grid), the relay will not trigger. If this
happens, all LEDs and the display go out. The inverter
is shut down completely. A fault signal cannot be sent.