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Electricity Connection
5.2
AC Connection
AC cable connection
5.2.1
1. Measure and access the voltage and frequency of the point to ensure that it meets the grid-tied
specifications of the inverter.
2. PE wire(GND) must be well grounded to ensure that impedance between Neutral wire and Earth wire
be less than 10Ω.
3. Disconnect the circuit breaker or fuse from the inverter and grid-connected access point.
4. Use the copper wire.
5. Follow these steps.
No. Name
100mm(Recommended)
L+2mm
L
Note:It is recommended to use outdoor dedicate cables
A
B
with multiple copper cores.
Select proper AC cables and OT terminals (5)
1
Unscrew the nut of the cover and thread the AC cable (5 wires) cross the nut、threaded sleeve and the
the cover. Then crimp the OT terminal and use heat shrink tubing or insulation tape for protection.
Wires threading and pressing.
2
3
Lock the AC cable to the corresponding AC terminals.
(
Only take 25k modle as an example
)
20
Three phase Grid-tied PV String Inverter User Manual
5K-15K 17K-20K 22K-25K
Model
A Wire outer diameter(mm)
11-18
24-32
24-32
Range
4-6
6-16
B Cross-sectional
area
(mm²)
6
10
Recommended
Heat shrinkable tube
D
L1 L2 L3 N PE
Screw Torque
D
M4
1.5N.m 10mm
5K-15K
M5
3N.m
12.5mm
17K-25K
Three phase Grid-tied PV String Inverter User Manual
➀Align the AC cover with the 4 holes and tighten it firmly with 4×M4 screws.
➁Fasten the nut(waterproof cap).
4
10-1
16
5.2.2 AC Breaker and Leakage current protector
Ensure the inverter can safely disconnect to the grid, the independent AC breaker must be
configured for each inverter as a protective device.
WARNIMG
Inverter Model
PV 5KTL-D3/G2,PV 6KTL-D3/G2,PV 8KTL-D3/G2
PV 10KTL-D3/G2,PV 10KTL-D3/G2P, PV 12KTL-D3/G2,
PV 15KTL-D3/G2, PV 15KTL-D3/G2P
PV 17KTL-D3/G2
PV 20KTL-D3/G2
PV 22KTL-D3/G2, PV 25KTL-D3/G2
Internal current detection equipment for inverter, the inverter detects the leakage of the power
grid that is greater than the reduced value, and will be disconnected quickly from the power grid. If the
external installation leakage protection device is installed, Its action current must be greater than equal
to 300mA.
Nut
②
M25
5K-15K
M40
17K-25K
① 4*M4 screws;1.2N.m
Multiple inverters are not allowed to share a circuit breaker.
Load is not allowed to connect between the inverter and the AC breaker.
Electricity Connection
Torque
5.5N.m
12N.m
Recommended Value
20A
32A
40A
50A
63A
21
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