11
12
5
Grid (Utility) Connection
5.1 Preparation
NOTE:
power distribution.
NOTE2: The inverter is built in a 25A/400V breaker to protect the inverter from AC
power damage.
The overvoltage category of the AC input is III. It should be connected to the
WARNING!
appropriate cable for grid (utility) connection. To reduce risk of injury, please use
the proper recommended cable size as below.
It's very important for system safety and efficient operation to use
Suggested cable requirement for AC wire
Nominal Grid Voltage
Conductor cross-section (mm2)
AWG no.
230VAC per phase
10-16
8-6
5.2 Connecting to the AC Utility
Overview of AC Connection Socket
A
B
C
D
E
Component
A
B
C
D
E
Description
Pressure dome
Clip
Sealing nut
Protective element
Socket element
Step 1: Check the grid voltage and frequency with an AC voltmeter. It should be the
same to “VAC” value on the product label.
Step 2: Turn off the circuit breaker.
Step 3: Remove insulation sleeve 13 mm for five conductors.
Step 4: Thread the five cables through pressure dome (A), clip (B), sealing nut (C) and
protective element (D) in sequence.
Step 5: Thread five cables through socket element (E) according to polarities
indicated on it and tighten the screws to fix wires after connection.
L1
→
LINE 1 (Black)
L2
→
LINE 2 (Grey)
L
→
LINE 3 (Brown)
→
Ground (Yellow-Green)
N
→
Neutral (Blue)
The reference tightening torque is 1.5-2.5 N.m.
Step 6: Push protective dome (D) on to socket element (E) until both are locked
tightly. Then, twist protective element (D) and pressure dome (A) so that all cables are
firmly connected.
Figure 5.1
Figure 5.2
Figure 5.3
Figure 5.4
Table 5.1
Table 5.2
