5.4.2 Wiring AC Output
Conditions for the AC Connection
Residual-current protective device
Connection of a second protective conductor
You must comply with the connection requirements of your utility operator.
All usages must comply with the regulations.
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.
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
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 4000UE:10A/400V
Growatt 5000UE/ 6000UE: 16A/400V
Cable requirements:
Diameter(mm)
Area(mm²)
(AWG)
2.05~2.59
4~6
12~10
Conductor
Cross section
Max. cable length(m)
4.0 mm²
6.0 mm²
Model
Fuse current
4000UE
10A
Growatt 4000UE
25.4m
40.4
Growatt 50000UE
32.4
Growatt 60000UE
27
21
22
20.3m
16.9m
We recommend to connection fuses in series on the output side. The current of fuse
see below.
5000UE/6000UE
15A
1. The AC side terminals of the inverter are like the following figure, it is clear to confirm
that 'L1, L2, L3' represents three live line output, "N" represents neutral line and is
grounding line.
2. Connect five standard cables into relevant terminals. The five cables should be put
through the protection shell, as Fig. 5.7.
3. Fasten the protection shell onto the bottom of the inverter, make sure the four screws
are tightened, the completed appearance is like the below figure.
Fig 5.7
