Installation Manual
33
includes three cables of each phase. The distance between groups should be at least twice
of the cable cross-sectional area.
Schematic diagram is shown below:
L3
L2
L1
L3
L2
L1
L3
L2
L1
A
B
B
Fig. 7-3
AC cable routing
Item
Description
Requirement
A
Cable cross-section
B≥2A
B
Distance between cable groups
7.9.3
Cable Connection
There are 8 round holes of
Φ
17 for each of the three phases. It is recommended to
connect 8 cables of 185mm
2
to each phase. The cable connection area is shown by A in
the figure below.
A
Fig. 7-4
AC side cable connection terminal
AC output of the inverter is fed into the grid via medium-voltage transformer. Proceed as
follows to connect the AC cables to the MV transformer:
Step 1.
Disconnect the downstream AC switches.
Step 2.
Ensure the phase sequence of the AC connection cable is correct.
Step 3.
Strip off the insulation on the end of the cable. The stripped length should be about 5 mm
longer than the depth of the cable lug. It is recommended to use a DT-70 cable lug considering the
selected cable specification.
Step 4.
Crimp the cable lug.
1.
Insert the stripped copper cable into the cable lug.
2.
Crimp the cable lug with crimping device for more than two times.
Step 5.
Insert the heat-shrinkable tubing.
1.
Select an appropriate heat-shrinkable tubing according to the cable specification,
where the heat-shrinkable tubing should be 2 cm longer than the depth of the cable
