All rights reserved Shenzhen SOFARSOLAR Co ., Ltd.
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All rights reserved Shenzhen SOFARSOLAR Co ., Ltd.
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Prerequisites:
The PGND cables are prepared (8 AWG outdoor power cables are recommended for
grounding purposes).
Procedure:
Step 1 Remove the insulation layer with an appropriate length using a wire stripper, as shown
in Figure 4-3.
L2=L1+(2-3)mm
L1
Note：L2 is 2 to 3mm longer than L1
Step 2 Insert the exposed core wires into the OT terminal and crimp them by using a crimping
tool, as shown in Figure 4-4.
L3<2mm
L4<1.5mm
Note 1: L3 is the length between the insulation layer of the ground cable and the crimped part.L4 is the distance between the
crimped part and core wires protruding from the crimped part.
Note 2: The cavity formed after crimping the conductor crimp strip shall wrap the core wires completely. The core wires shall
contact the terminal closely.
Step 3 Install the crimped OT terminal, flat washer, and spring washer on the M5 welded
stud, and tighten the nut to a torque of 5 N.m using a socket wrench.
To enhance the anti-corrosion performance of the ground terminals, apply silica gel on them after connecting the
ground cable.
Note:
Figure4-4 Preparing a ground cable (2)
Figure4-3 Preparing a ground cable (1)
Context
All the AC output cables used for the inverters are outdoor five-core cables. To facilitate the
installation, use flexible cables . Table 4-1 lists the recommended specifications for the cables
and the breakers.
Type
Sofar 10000TL
-Sx Series
Sofar 15000TL
-Sx Series
Sofar 17000TL
-Sx Series
Sofar 20000TL
-Sx Series
4mm²
≥
4mm²
≥
6mm²
≥
6mm²
≥
20A 32A 40A 40A
Sofar 10000TL
-Sx Series
Sofar 15000TL
-Sx Series
51
The cross-section of the AC line conductor must be sized in order
to prevent unwanted disconnections of the inverter from the grid
due to high impedance of the line that connects the inverter to
the power supply point; In fact, if the impedance is too high, it
causes an increase in the AC voltage that, on reaching the limit set
by the country of installation, causes the inverter to switch off
Table4-2.
Multi core copper wire≥6mm²
Multi core copper wire
Caution
It is not allowed for several inverters to use the same circuit breaker.
It is not allowed to connect loads between inverter and circuit breaker.
Table4-1
Cable(Copper)
Breaker
Note: For the sake of safety, please make sure to use correctly sized cables, otherwise the current makes the cable overheat or
overload, even cause a fire.
Table4-2
The cable
cross-sectional
area(mm²)
The maximum length(m)
68
85
137
35
47
59
95
6
8
10
16
4
34 23
Sofar 17000TL
-Sx Series
Sofar 20000TL
-Sx Series
27
36
45
73
//
In Italy, any solar system bigger than 6kW should be connected to grid via a external SPI.
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SOFAR 10K~20KTL
User manual
SOFAR 10K~20KTL
User manual
The inverter does not require an external residual-current device when in operation.
If one is required under local regulations, SOFAR recommends a type A or B RCD with
sensitivity of 100mA or higher.
Where local electricity code requires an RCD with a lower leakage ratings, the discharge
current might result in nuisance tripping of the external RCD. Sofar recommends the
following measure in selecting an external RCD to avoid nuisance tripping:
1: Selecting appropriate RCD.
2: Configure the trip current of inverter internal RCD to a lower value that the trip current of the external RCD.
4.3 Connecting AC Output Power Cables
Connect the SOFAR 10-20KTL to the AC power distribution frame (PDF) or electrical grid using
AC output power cables.
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