KACO blueplanet 1502x - Manual (Page 16)

Page 16 blueplanet Installation Instructions 1502x - 5002x
ACTION
Before connecting the PV generator to the bluepla-
net, check that the PV generator is not grounded.
– Measure the DC voltage between the protective
ground (PG) and the positive lead and between
the protective ground (PG) and the negative lead
of the PV generator.
– If stable voltages can be measured, this indicates
a ground fault in the PV generator or its wiring.
The ratio between the measured voltages gives an
indication as to the location of this fault. Rectify
this fault before taking any further measurements.
– Measure the electrical resistance between the
protective ground (PG) and the positive lead and
between the protective ground (PG) and the nega-
tive lead of the PV generator.
– Low resistance (< 2 MΩ) indicates a high-impe-
dance ground fault of the PV generator, which
must be fixed prior to continuing with the instal-
lation.
ACTION
The ground for the DC input is provided by the inte-
gral GFDI circuit. DC input should not be grounded
external to the unit.
Circuit board fuse
The power section has two internal circuit board fuses.
These are labelled F801 or F861 on the circuit board.
F801:
Model: 179120 5x20 time-lag 250 V
AC
/ 0.4 A
Manufacturer: SIBA
F861:
Model: TR5-Fuse series 372 250 V
AC
/ 125 V
DC
/ 1 A time-lag
Manufacturer: Littelfuse/Wickmann
!
WARNING
For continued protection against risk of fire, replace only with
same type and ratings of fuse.
Positive Grounded System
NOTE
In this configuration the Positive of the PV generator
is grounded through the GFDI fuse.
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39

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39

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39

Negative Positive
Figure 5.5 DC connection 3502x / 5002x series - Positive
Grounding System
NOTE
A screwdriver (slotted, 3.5 mm) is to be used for the
terminals in the inverter. Put the screwdriver into the
intended cut-out. Press the screwdriver upwards a
bit. Put the cable into the spring terminal. Put the
screwdriver back into the original position. Remove
the screwdriver. The spring terminal is closed and
the cable is held in place. Lightly pull on the wire to
be sure it is secure.
! CAUTION
Be sure the inverter is configured for the proper DC grounding
configuration of the system.
!
CAUTION
The voltage of the solar generator must be measured before
connecting the DC leads to the inverter terminals. The DC vol-
tage must not exceed the max. generator voltage because this
would destroy the unit.
Section 5 · Installation and Start-up