Figure 4.15 Stripped AC Wires
4. Installation
For all AC connections, 10- 25mm 105
℃
cable is required to be used. Please make sure
2
the resistance of cable is lower than 1.5ohm. If the wire is longer than 20m, it's recommended
to use 16-25mm cable.
2
4. Installation
4.3.2 Connect grid side of inverter
.17.
Additional explanation:
If the diameter of the protective layer of the AC
cable is less than the
recommended (18
-
25mm)
it should be spirally wounded the protective.
B
)
Disassemble
the
4
screws
on
the
AC
terminal
cover
and
take
out
the cover.
Disassemble
the
screw
under
terminal
rack
and
Pull
out the
terminal
(
as
shown
in
figure
4
.
16
)
cable diameter
18~25mm
cable size 10-25mm
60mm
x
PE
L
N
2
x=10mm
x
The steps to assemble the AC grid terminals are listed as follows:
A) Strip the end of AC cable outer insulating jacket about 60mm then strip the end of each
wire about 10mm. (as shown in figure 4.15)
Figure 4.16 Disassemble AC terminal cover
C) Insert the 3 cables into AC terminal and use the slotted screwdriver to tight the screws.
The torque is 2-2.5Nm.( as shown in figure 4
.
17
)
Figure 4.17 Connect cable to AC terminal
WARNING:
Please do not put the insulating layer of the cable in to the terminal when tight
the screws, otherwise it will cause poor contact.
D) Push the AC terminals along the rail to the inside of the inverter then tighten the screw
under rack. Lock the 4 screws of AC terminal and tighten the cap nut of AC terminal.
(as shown in figure 4.18)
Figure 4
.
18
Tighten the
AC
terminal
.16.
If DC inputs are accidently reversely connected or inverter is faulty or
not working properly, it is NOT allowed to turn off the DC switch as it
will damage the inverter and even leads to a fire disaster.
The correct actions are:
*Use a clip-on ammeter to measure the DC string current
*If it is above 0.5A, please wait for the solar irradiance reduces until the
current decreases to below 0.5A.
*Only after the current is below 0.5A,
you are allowed to turn off the DC switches and disconnect the PV strings.
Please note that any damages due to wrong operations are not covered in
the device warranty.
Caution:
