5
vacon • 23
ELECTRICAL CONNECTION
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5.2
Cabling
Before connecting the cables to the solar inverter, use a multimeter to check that the cables to be
connected are not live.
Cables coming from photovoltaic panels will be active while panels are lit.
The tightening torques of
all
power connections are given in table below:
5.2.1
Earth connection
The solar inverter has an earth connection terminal to which all the inverter's metallic parts are
connected. This connection terminal must be connected to earth. After the PE busbars have been
joined together as instructed in chapter 4.3, the PE busbar must be earthed. See appendix B.
5.2.2
Connection to mains
The terminals of the power supply can be reached through the bottom part of the equipment. The
solar inverter has three connection terminals, to which mains cables are connected.
Make openings for the cables in the grommets on the bottom of the cabinet and lead through the
cables. See Figure 5-5.
Figure 15.Main cabling NXV0125 standalone unit (cable clamps not included in delivery)
Table 5. Tightening torques of power connections
Screw/Bolt
size
Tightening torque
[Nm]
M6
8...10
M8
18...22
M10
35...45
M12
65...75
L1
L2
L3
DC+
DC-
PE busbar
