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5.4 Electrical Connections
5.4.1 Safety
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
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 Installthe 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 or 480Vac for
40000 TL3; Frequency: 50Hz/60Hz; in 3-Phase);
Open the breaker between the PV inverter and utility;
Specification of AC breaker: Growatt 30000 TL3: 63A/400V
Growatt 33000 TL3: 80A/400V
Growatt 40000 TL3: 80A/480V
Cable requirements:
Growatt 30000 TL3
Growatt 33000 TL3
Growatt 40000 TL3
10~16
10~16
10~16
7~5
7~5
7~5
Model
Area(mm²)
Available wire gauge (AWG)
Conductor
Cross section
Max. cable length(m)
Growatt 30000 TL3
Growatt 33000 TL3 Growatt 40000 TL3
10.0 mm²
14.0 mm²
16.0 mm²
30
42
50
25
38
45
25
38
45
Please do not use single-core wire cable.
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