Three-phase photovoltaic grid-connected inverter
Installation
23
Table 4-3 Recommended lead specification
Inverter
model
DC side
AC side
Min
cross-section
mm²(length
≤50m)
Min cross
section
areamm²
(Length>50m)
Min cross
section
areamm²
(Length
≤50m)
Recommended
terminals
L
N/PE
L
PE
40kW
4
6
25
16
GTNR25-6
GTNR16-5
50kW
4
6
25
16
GTNR25-6
GTNR16-5
60kW
4
6
35
25
GTNR35-6
GTNR25-5
70kW
4
6
35
25
GTNR35-6
GTNR25-5
4.2.4 Micro breaker
In order to ensure safe operation of the inverter and circuits, it is recommended to configure
corresponding micro breaker or fuse on the DC input end and AC output end of the inverter. Table
4-4 is the requirements recommended for micro breaker:
Table 4-4 Specification of micro breaker
Inverter
model
DC side
AC side
Recommended breaker
specification
Recommended breaker
specification
40kW
DC1000V, C100A, 2P
AC400V, C80A, 4P
50kW
DC1000V, C100A, 2P
AC400V, C100A, 4P
60kW
DC1000V, C150A, 2P
AC400V, C150A, 4P
70kW
DC1000V, C150A, 2P
AC400V, C150A, 4P
4.3 Mechanical installation
The material for fixing the inverter and the installation mode vary with the different installation sites.
It is recommended to install the inverter vertically to the firm wall or metal bracket. Here we take
wall installation as an example to introduce the installation matters of the inverter. Note that the
mechanical installation modes for single-phase and three-phase inverter are slightly different as
they carry differing outline structures.
As shown in the fig 4.5, the overall installation of the inverter should be vertical to the horizontal
surface.
