5 Electrical connection
26
5.4 DC wiring
This section provides complete, step-by-step proce-
dures for wiring the DC input from the PV array to
the NTX inverter.
WARNING
High voltage is present in PV modules exposed to
light. Death due to electric shock when touching a
DC conductor. During installation, cover all PV mod-
ules using opaque material.
WARNING
High voltage is present inside the DC cables. Death
or serious injury will result when damaging a DC
cable or touching a DC conductor. You have to con-
nect the DC cables from the PV array to the NTX
inverter in the order described in this manual.
WARNING
The input current shall not be excecd 17.5A DC
for each input channel (NTX 6000), 14.5A DC (NTX
5000), 11A DC (NTX 4000) AND 17.5A DC (NTX 3000
have only one MPPT input).
WARNING
Verify that the DC voltage in DC terminals block has
the correct polarity and is within the operational
range.
NTX 4000/5000/6000 can be configured as an indi-
vidual MPPT for each DC input channel, or config-
ured as single MPPT for the two input DC channels
connected in parallel.
If the inverter is configured as two individual MPPTs,
the max current for each channel shall not exceed
17.5 A DC for each input channel (NTX 6000), 14.5 A
DC (NTX 5000), 11 A DC (NTX 4000).
NTX 3000 can only be configured as one MPPT and
the max current for DC input channel shall not
exceed 17.5 A DC.
Configuring the DC input channel
NTX can be configured as two individual MPPT input
channels or single MPPT input channel (parallel)
according to your application (except NTX 3000).
If DC input are configured as single MPPT input
channel (parallel), setting must be done as follows:
1. According to section “Connection to a single PV
array (NTX 4000/5000/6000)”, see page 27 or
section “Parallel Connection to 2 PV arrays
(NTX 4000/5000/6000)”, see page 28, wires are
correctly connected.
2. Turn AC breaker/disconnect OFF, then turn DC
disconnect ON.
3. According to the manual described in section
“Setting Menu”, see page 35 to configure the
MPPT input channels, and select the value of “1”.
4. Turn AC breaker/disconnect ON.
GridMode: 240V
MPPT Input: 1
²
If DC input are configured as two individual MPPT
input channels, setting must be done as follows:
1. According to section “Two MPPTS connection to
2 PV arrays or 4 PV arrays (NTX 4000/5000/6000)”,
see page 28, wires are correctly connected.
2. Turn AC breaker/disconnect OFF, then turn DC
disconnect ON.
3. According to the manual described in section
“Setting Menu”, see page 35 to configure the
MPPT input channels, and select the value of “2”.
