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G
rid output connection (AC side)
In any case, the inverter's earth connection is mandatory.
When working with the wiring box
always protect the top of wiring box with proper IP66 protection covers (accessory of the PVS
Installation KIT, to be ordered separately) on the housing. Refer to the dedicated chapter
"Installation of IP66 protection covers for wiring box openings (long term installation)" for
further information about the installation procedures.
C
haracteristics and sizing of the protective grounding cable
Any failure of the inverter when it is not connected to earth through the appropriate connection
point is not covered by the warranty.
Cable diameter range
Max. conductor cross section
Cable lug dimensioning
The inverter must be connected to a three-phase system with the
center of the star connected to earth. To connect the inverter to the grid
is possible to choose between the four-wire connection (3 phases +
neutral) and the three-wire connection (3 phases).
Depending of the type of the AC panel it's possible to use single
conductors cables or a multipolar cable:
- Single-core configuration
neutral, "R", "S", "T" phases and a M25 cable gland for the earth cable.
- Multi-core configuration
"N" neutral, "R", "S", "T" phases and a M25 cable gland for the earth
cable.
The connections can also be made with the wiring box
the power module
which can be connected later for commissioning.
01
detached, (pay particular attention to outdoor installations)
02
ABB inverters must be earthed via the connection points marked with
the protective earth symbol
conductor cross-section for the maximum ground fault current that the
generating system might experience. In any case the minimum cross
section of the ground conductor must be at least 1/2 of phase
conductor cross section.
The ground connection can be made through the Protective earth point
(int.)
, Protective earth point (ext.)
25
regulations in force in certain countries of installation).
The sizing of the ground cable depend on the choice of the protective
earth point (internal
or external
25
Protective earth point (int.)
10 - 17 mm (M25 cable gland)
95 mm²
for M10 Stud
a = 10.5 mm (min)
b = 40 mm (max)
- 68 -
have 4xM40 cable glands for the "N"
11
(optional) have a M63 cable gland for the
56
and using a cable with an appropriate
or both (if this is required by
10
) where it will be connected:
10
Protective earth point (ext.)
25
for M8 Stud
a = 8.4 mm (min)
b = all dimension accepted
5 - Installation
detached from
02
10
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