Goodwe GW10K-DT - Electrical Connection

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) Add breaker or fuse to AC side, the specification should be more than 1.25 times of rated AC
output current.
(3) The PE line of inverter should be connected the earth, make sure the impedance of neutral
wire and earth wire less than 10ohm.
(4) Disconnect the breaker or fuse between the inverter and the utility.
(5) Connect the inverter to the gird as follows:There are two AC connector brands for inverter,
VACONN and WIELAND. Please refer to Figure 3.4.1-1.
(6) The AC line construction shall be such that if the cord should slip in its anchorage, placing a
strain on condutors, the protective earthing conductor will be the last to take the strain. such
as the PE line is longger than L and N.
Note: Multiple inverters are not allowed to share a circuit breaker.
The integrated leakage current detection device of the inverter can detect external leakage
current in real time. When the detected leakage current exceeds the limit value, inverter will
quickly disconnect with the grid, If the leakage current protection device is installed external-
ly, the action current should be 300mA or higher.
3.4.3 DC Side Connection
（1）Before connecting the PV strings, please ensure the plug connectors have the correct
polarity. Incorrect polarity could permanently 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.
（6）Positive shall be red, negative shall be black.
（7）The minimum insulation resistance to ground of the PV panels for SDT series must
exceed 33.4KΩ（R=1000/30mA）, there is a risk of shock hazard if the requirement of minimum
resistance is not met.
*Neutral conductor shall be blue, line conductor shall be black or brown（preferred,protec-
tive earth bonding line shall be yellow-green.
*Fix（moment:0.6N.m）the connector of AC cable to the corresponding terminals.
3.4.2 AC circuit breaker and leakage current protection device
In order to ensure that the inverter can be safe and reliable to disconnect from the power grid,
please install an independent two pole circuit breaker to protect the inverter.
Installation instruction of VACONN series please refer to figure 3.4.1-2.
Cable specification of AC side please refer to Figure 3.4.1-3.
VACONN Series
fasten screw cap clockwise fasten screw cap clockwise
Fastening three screws to
ensure each screw head is
not exceeding the surface
Material (Annealed copper wire)
Figure 3.3.2-2 Figure 3.3.2-3
Figure 3.4.1-1
Figure 3.4.1-2
Recommended circuit breaker specifications
16A
25A
32A
Inverter model
GW4K-DT / GW5K-DT / GW6K-DT
GW8K-DT / GW10K-DT
GW12K-DT / GW15K-DT
Figure 3.4.1-3
Grade
A
B
C
Value
10~12mm
2.5~6mm
2
10mm around
Description
O.D.
Bare Wire Length
Conductor Material
Sectional Area
0605
Pin1 ------ R phase
Pin2 ------ S phase
PinL ------ T phase
PinN ------ T phase
PinPE ----- PE phase