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7 Electrical Connection
7.5 Wiring AC Output
To ensure the inverter can be safely disconnected with load, must install a separate single-phase
circuit-breaker or other load disconnection unit for each inverter.
Note: The inverter is equipped with integrated RCM (Residual current operated monitor) and RCD
(Residual current protective device). The rated residual current of the circuit breaker must be over
Warning
300mA when the AC circuit breaker with RCM function selected.
The total capacity of PV-inverter is more than 3KW and less than or equal 6KW, the inverter's
displacement power factor is adjustable between 0.95 leading to 0.95 lagging, and do not need external
SPI.
The total capacity of PV-inverter is more than 6KW, the inverter's displacement power factor is
Notice
adjustable between 0.9 leading to 0.9 lagging, meanwhile need external SPI.
Install an independent two-pole circuit breaker at the output side of the inverter for protection, the recommended AC
circuit-breaker specifications are as follows:
Inverter type
CSI-7K-S22002-E
CSI-8K-S22002-E
CSI-9K-S22002-E
Recommend AC cable length:
Conductor cross section
Inverter Type
CSI-7K-S22002-E
CSI-8K-S22002-E
CSI-9K-S22002-E
AC Three-core cable:
The grid connection is established by using three-core cable (L, N, and PE, as per FIG. 7-4).
Components of AC connector:
The AC connector is made of four components: pressure nut, sealing ring, threaded sleeve, and plug.
Pressure Nut
Pressure screw
AC wiring procedure:
1) Strip the cable's jacket, and then adjust the relative length of L, N and PE cables, to make the length of PE cable is at
least 5mm longer than L and N ones, as per FIG. 7-3.
2）When using flexible cables, the conductor must be connected with suitable core end ferrules according to DIN
46228-4, as per FIG. 7-4.
FIG. 7-3 Adjust the Cable Length
3) Insert L, N, and PE conductors into the corresponding pins of the plug (as per FIG. 7-5), then tighten the fastening
screws by screwdriver to fix conductors firmly. Torque, 2 N.m.
Sealing Ring
Sealing ring
FIG. 7-2 Components of Connector
PE
N
L
45.0
AC circuit-breaker specifications
40 A
50 A
50 A
Allowed Max. length
6.0 mm
2
10.0 mm
33 (m)
29 (m)
26 (m)
Threaded Sleeve
Threaded sleeve
8.0
FIG. 7-4 Crimp the Three-core's Ferrule
2
16.0 mm
56 (m)
89 (m)
48 (m)
77 (m)
43 (m)
69 (m)
Plug (Metal pins and shell)
Socket element
L
N
PE
2
9 / 17
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