All rights reserved
Shenzhen SOFARSOLAR Co ., Ltd.
C
Document Version 2.0(2016.03.29)
25
All rights reserved
Shenzhen SOFARSOLAR Co ., Ltd.
C
Document Version 2.0(2016.03.29)
26
User manual
User manual
Electrical Connections
Electrical Connections
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.
End
Note:
Figure4-4 Preparing a ground cable (2)
Figure4-3 Preparing a ground cable (1)
Sunny Horse Series
(
10K~20KTL)
Sunny Horse Series
(
10K~20KTL)
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
4.3 Connecting AC Output Power Cables
Connect the Sunny Horse Series to the AC power distribution frame (PDF) or electrical grid
using AC output power cables
.
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
mm²
≥
6
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(mm
²
)
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.
31
42
52
84
