5.5 Connection of the Inverter
PV String Connection
Ø
X3 series inverter have three couples PV connectors which can be connected in
series into 3-strings PV modules. Please select PV modules with excellent function
and reliable quality. Open circuit voltage of module array connected should be
＜
Max.DC (table as follow) input voltage, and operating voltage should be within
the MPPT voltage range.
c)
d)
Table 3 Max. DC Voltage Limitation
Max.DC Voltage
1000V
Warning!
PV module voltage is very high which belongs to dangerous
voltage range, please comply with the electric safety rules when
connecting.
Warning!
Please do not make PV positive or negative ground!
Note!
Please follow the requirements of PV modules as below:
Same type; Same quantity; Identical alignment; Identical tilt.
In order to save cable and reduce the DC loss, we suggest
installing the inverter near PV modules.
5.5.1 The Main Steps to Connect to the Inverter
IBMU
18
Installation
Installation
Model
Note!
Please choose a suitable external DC switch if the model (X3
-
8
.
0P
-
T
-
N
,
X3
-
10
.
0P
-
T
-
N
,
X3
-
12
.
0P
-
T
-
N
,
X3
-
15
.
0P
-
T
-
N) is purchased.
X3-8.0P-T-N
X3-8.0P-T-D
X3-10.0P-T-N
X3-10.0P-T-D
X3-12.0P-T-N
X3-12.0P-T-D
X3-15.0P-T-N
X3-15.0P-T-D
Danger!
Danger to life due to high voltage on DC conductors.
when exposed to sunlight,the pv array generates dangerous DC
voltage which is present in the DC conductors.Touching the DC
conductors can lead to lethal electric shocks.
Cover the PV modules. Do not touch the DC conductors.
19
Connection Steps
Below tools are needed before connection.
Strpping pliers
Wire crimper
Wire crimper recommended model :
H4TC0001
manufacturer:Amphenol
7.0 mm
12AWG
trip length
d) Crimp pin contact by using the wire crimper.
c) Insert striped wire into pin contact and ensure all conductor strand are captured
in the pin contact.
f ) Insert the wire into plug forcibly, when a "click” is heard or felt the pin contact
assembly is seated correctly. Then tighten the cable nut.
pin contact
Crimp these parts
e) Separate the DC connector as two parts: the plug and the cable nut.
Then insert the wire with pin contact through the cable nut.
Wire crimper
plug
cable nut
a) Turn off the DC switch, then Choose 12 AWG wire to connect the PV module.
b) Trip 7mm of insulation from the wire end by using the strpping pliers.
( recommended model: H4TC0001, manufacturer: Amphenol)
