* Neutral conductor shall be blue, line conductor shall be black or brown（preferred), protective
earth bonding line shall be yellow-green.
* Fix the connector of the AC cable to the corresponding terminals (tightening torque: 0.6N.m)
4.3.2 AC circuit breaker and leakage current protection device
In order to ensure that the inverter can be safely and reliably disconnected from the power grid,
please install an independent two pole circuit breaker to protect the inverter.
Cable specification of AC side .
Annealed copper wire
A
B
C
Grade
A
B
C
Description
O.D.
Conductor Material Sectional Area
Bare Wire Length
Value
10~18mm
4~6mm
2
10mm around
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 from the grid, If the leakage current protection device is installed externally,
the action current should be 300mA or higher.
4.3.3 DC Side Connection
1. Before connecting the PV strings, please ensure that 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 manufacturer are permitted for use.
4. The positive and negative pole are not allowed to connect to the PE wire（Ground wire).Other-
wise, it will damage the unit.
5. Do not connect positive or negative pole of PV string to PE wire. Otherwise , it will cause damage
to inverter.
6. Positive cable shall be red, negative cable shall be black.
7. The minimum insulation resistance to ground of the PV panels for SDT G2 series must exceed
33.4KΩ(R=1000/30mA).There is a risk of shock hazard if the requirements of minimum
resistance are not met.
Recommended circuit breaker specifications
16A
25A
32A
Inverter model
GW4K-DT / GW5K-DT / GW6K-DT
GW8K-DT / GW10KT-DT
GW12KT-DT / GW15KT-DT
DC Cable specification.
DC Cable should use dedicated PV cable
(Suggest using 4mm PV1-F wire).
DEVALAN SERIES MC4 SERIES
AMPHENOL SERIES QC4.10 SERIES
Grade
A
B
C
Description
O.D.
Conductor Material Sectional Area
Bare Wire Length
Value
4~5mm
2.5~4mm
2
7mm around
A B
C
There are four types of DC connectors, DEVALAN, SUNCLIX/MC4, AMPHENDL H4 and QC4.10
series.
Please use special tools to do crimping
MC4 & QC4.10 DEVALAN & AMPHENOL
Do not crimp wire
into the limit buckle.
Negative connector
Positive connector
Inverter side
The installation method of DC connector.
4.3.3 Earth Terminal Connection
The inverter is equipped with earth terminal according to the requirement of EN 50178.
All non-current carrying exposed metal parts of the equipment and other enclosures in the PV
power system must be grounded.
Please follow the steps below to connect "PE" cable to ground.
1009
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