Description
O
.
D
Conductor Material
O
.
D
Wire Length
Bare Wire Length
Terminal
Value
Max 12mm
2.2~2
.
7mm
25mm
12mm
Grade
A
B
C
D
E
Figure
3.4.1-2
A
D
3.4.2 DC Side Connection
Cable specification of AC side is showed as Figure 3.4.1-2.
(
1
)
damage the unit.
(
2
)
The open circuit voltage of the PV strings cannot exceed the maximum input voltage of the inverter.
(
3
)
Only DC connectors provided by us are permitted to use.
(
4
)
The positive and negative pole is forbid to connect PE wire (Ground wire), otherwise, it will damage the unit.
(
5
)
Don't connect positive or negative pole of PV string to PE wire. Otherwise, it will cause damage to inverter.
Before connecting the PV strings, please ensure the plug connectors have the correct polarity. Incorrect polarity could permanently
05
06
A
B
3.4 Electrical Connection
3.4.1 Connection to grid (AC side Connection)
(
1) Check the grid voltage and frequency if it can comply with the required voltage and frequency of inverter connection.
(
2) It
is suggested that the breaker or fuse will be added in the AC side, its current should be over 1.25 times of rated current.
(
3)
Measure the impedance of neutral wire and ground wire to make sure it’s less than 10 ohm.
(
4)
Disconnect the breaker or fuse between the inverter and the utility.
(
5
)
Connect the inverter to the grid as follows:
Put the
AC cable through the components in this order: screw cap, one-hole sealing ring, insulation body and sheet metal parts.
The
way
of
connecting
the
AC
cable
can
be
shown
as
Figure
3
.
4
.
1
-
1
.
E
C
Figure
3.4.1-1
Screwdriver
T
he
Insulator
AC
output
board
AC
wire
M3X8
screw
AC
connector
Single
hole
seal
ring
Screw
cap
Grade
Description
A
O
.
D
.
B
C
Bare Wire Length
Conductor Material
Sectional Area
Value
4~5mm
2
2.5~4mm
7mm around
3.4.3 USB Communication
USB cable should be connected as Figure 3.4.3-1.
Figure 3.4.3-1
If you need USB monitoring solution, please download EzExplorer software at www.goodwe.com.cn.
Installation instruction of the DC connector
refer to Figure 3.4.2-1.
Figure
3.4.2-1
DC Cable specification is showed as Figure 3.4.2-3.
Figure
3.4.2-3
A
B
C
7mm
7mm
2
2
.
5
~
4mm
2
2
.
5
~
4mm
PV
+
connector
(
Standard
Accessories
)
PV
-
connector
(
Standard
Accessories
)
inverter
side
1
.
open
the
UBS
cover
2
.
insert
the
US
data
cable
B
Make
sure
the
cable
is
connected
well
and
can
'
t
be
plugged
out
after
connecting
with
AC
terminals
.
For GW2500-NS and GW3000-NS, if use
please connect the Branch Socket to the DC connector of the inverter first,
refer to Figure 3.4.2-2.
Branch Socket,
Figure 3.4.2-2