7
Ring terminal:
5.
Grid (Utility) Connection
5-1. Preparation
NOTE 1:
The overvoltage category of the AC input is III. It should be connected to the
power distribution.
NOTE 2:
The inverter is built in a 63A/400V breaker to protect the inverter from AC
power damage.
WARNING!
It's very important for system safety
and efficient operation to use appropriate cable
for grid (utility) connection. To reduce risk of injury,
please use the proper recommended cable size as below.
Suggested cable requirement for AC wire
Model
Typical
Amperage
Cable
Size
Ring Terminal
Torque
Value
Cable mm
2
Dimensions
D (mm)
L (mm)
SP20K Premium
40A
8AWG
8
5.3
23.8
2.0~2.4Nm
5-2. Connecting to the AC Utility
1.
Before making AC input connection, be sure to open DC protector or disconnector
first.
2.
Remove the terminal screws.
3.
Insert the ring terminal of AC input wires flatly into AC input connector according to
polarities indicated on terminal block and tighten the terminal screws. Be sure to
connect PE protective conductor (
)
first.
→
Ground (yellow-green)
R Phase
→
LINE (black)
S Phase
→
LINE (gray)
T Phase
→
LINE (brown)
N
→
Neutral (blue)
CAUTION:
To prevent risk of electric shock, ensure the ground wire is properly earthed
before operating this inverter no matter the grid is connected or not.