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5.3.1.1. 2 MPPT units (EQX2 4002-T .. EQX2 25002-T).
Fig. 19. Earthing terminal connection.
5.3.1.2. 4 MPPT units (EQX2 33004-T, EQX2 40004-T,
EQX2 50004-T and EQX2 60004-T).
Fig. 20. Earthing terminal connection.
5.3.1.3. 10 MPPT units (EQX2 110010-T).
Fig. 21. Earthing terminal connection.
62
5.3.2. Solar field connection.
The following must be taken into account when making the
1.
electrical connections to the inverter:
Disconnect the AC switch on the grid side.
a.
The inverter's DC switch must be set to "OFF".
b.
To ensure that the best practices are followed, check that
c.
the photovoltaic panels connected in each string are of
the same model and specifications.
Check that the maximum output voltage of each
d.
photovoltaic string does not exceed the maximum voltage
specified in the table of technical characteristics in the
section "9. Technical features.".
Insert the relevant DC circuit breakers, according to the
e.
following Tab. 7:
A distance of 5 m must be left between the circuit breakers
f.
and the unit.
Isolating
Model
switch
EQX2 4002-T
EQX2 5002-T
EQX2 6002-T
EQX2 8002-T
EQX2 10002-T
EQX2 12002-T
EQX2 15002-T
Built into
EQX2 17002-T
the unit
EQX2 20002-T
EQX2 25002-T
EQX2 33004-T
EQX2 40004-T
EQX2 50004-T
EQX2 60004-T
EQX2 100010-T
Tab. 7. DC circuit breakers.
DC connector assembly procedure.
2.
Select the suitable photovoltaic cable:
a.
Type of cable
General
Range (mm
photovoltaic
2,5 - 4,0
cable
Tab. 8. Selecting the photovoltaic cable.
Strip 7 mm of the insulation sleeve of the DC cable,
b.
as shown in Fig. 22:
Cable cross-section 2.5-4 mm
7 mm
Fig. 22. Wire end stripping.
Overvoltage
circuit breaker
If lightning
rods are
If no
Fuses
installed
lightning
or there
rod is
is a high
installed
probability
of lightning
1000 Vdc
15 A
fuses
Type II
Type I+II
40 kA
5 kA
600 Vdc
1000 Vdc
1000 Vdc
15 A
fuses,
1 per
string
Cross-section area
)
Recommended value (mm
)
2
2
4,0
2
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