5.4 Electrical Connections
5.4.1 Safety
DANGER
Danger to life due to lethal voltages!
High voltages which may cause electric shocks are present in
the conductive parts of the inverter. Prior to performing any
work on the inverter, disconnect the inverter on the AC and
DC sides
WARNING
Danger of damage to electronic components due to electrostatic
discharge.
Take appropriate ESD precautions when replacing and installing the
inverter.
5.4.2 Wiring AC Output
Conditions for the AC Connection
You must comply with the connection requirements of your utility operator.
All usages must comply with the regulations.
Residual-current protective device
The inverter is equipped with an integrated universal residual-current monitoring
unit.
If the network operator stipulates a residual-current protective device, you must use
a residual-current protective device that triggers in the event of a residual-current of
100 mA or more.
Connection of a second protective conductor
In some installation countries, a second protective conductor is required to prevent a
touch current in
the event of a malfunction in the original protective conductor.
For installation countries falling within the scope of validity of the IEC standard
62109, you must Install
the protective conductor on the AC terminal with a conductor cross-section of at
least 10 mm²Cu.
Or Install a second protective conductor on the earth terminal with the same cross-
section as the original
protective conductor on the AC terminal
NOTICE
Please do not use single-core wire cable.
There are three types of AC connector for Growatt UE series inverters. Please follow the
instructions corresponding to the parts we offer you.
AC connector 1:
Assembly procedure:
1) Connect the cables into their respective channels, 'N' on the picture represents
Neutral channel (marked with '1' on the terminal), '1,2,3' on the picture represent
three Live line channels (marked with '2,3,4' on the terminal), and GND on the
picture represents Ground channel (marked with on the terminal).
Load disconnection unit
You must install a separate three-phase miniature circuit-breaker or other load
disconnection unit for each inverter in order to ensure that the inverter can be safely
disconnected under load.
Measure the public grid voltage and frequency (Voltage: 400Vac; Frequency:
50Hz/60Hz; in 3-Phase);
Open the breaker between the PV inverter and utility;
Specification of AC breaker: Growatt 7000UE:16A/400V
Growatt 8000UE/ 9000UE: 20A/400V
Growatt 10000UE/ 12000UE: 25A/400V
Growatt 18000UE/ 20000UE: 50A/400V
Cable requirements:
Model
Diameter(mm)
Area(mm²)
Available wire gauge (AWG)
10000UE
2.05~4.11
4~16
12~6
12000UE
2.05~4.11
4~16
12~6
18000UE
2.59~4.11
6~16
10~6
20000UE
2.59~4.11
6~16
10~6
9000UE
2.05~4.11
4~16
12~6
8000UE
2.05~4.11
4~16
12~6
7000UE
2.05~4.11
4~16
12~6
Conductor
Cross section
Max. cable length(m)
6.0 mm²
10.0 mm²
16.0 mm²
Growatt
10000UE
48
72
105
Growatt
12000UE
40
60
88
Growatt
18000UE
27
40
59
Growatt
20000UE
25
36
53
AC connector type
Conductor cross-section (mm²)
Stripping length (mm)
Connector 1
4.0-6.0
8
Connector 2
4.0-6.0
8
Terminal 3
6.0-16.0
10
Growatt
7000UE
70
140
220
Growatt
10000UE
60
125
200
Growatt
10000UE
54
110
15
21
22