Sunways STH 3-8kW Series, User Manual

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6) Lock the AC connector cover to the inverter with screws, as shown in Figure 4-27:
7) Screw up the rubber ring and anti-water cap to make sure the AC connector is well sealed, as
shown in Figure 4-28:
4.3.6 Meter and CT connection
1) The current transducer, also called CT, is usually installed on the fire wires between the house
loads and the power grid, as shown in Figure 4-29.
The Meter can install in the AC combiner box or other places that are unable to be touched by
children. Sunways CT integrated a cable with length of 2m and could be extended to 5m at max.
Figure 4-34 CT connection diagram
② The CTs have been connected to the Sunways Meter when you received them, and you
just need to follow the wiring diagram in the Meter to connect CT, as shown in Figure 4-35.
Attention
CT installation direction and phase sequence should strictly follow the instruction in the
user manual, otherwise, the inverter may not be working normally.
Attention
The CT has to be corresponding with the port in the meter, and the connection between
CT and Meter needs to be reliable, otherwise, the CT measurement accuracy may be af-
fected.
Note
The rated current of CT in the inverter accessory box is 80A, and the maximum allowed
inserted cable diameter is 16mm. If the max current through the CT exceeds the rated
current or the cable diameter is wider than 16mm, please contact Sunways for help.
CT
To Sunways Meter
Power Meter
Sunways Meter
AC Br
eak
er
AC Breaker
AC Breaker
FN
Se
t
Ru
n
Ac
re
l
AC
R1
0R
R_
P
Figure 4-35 Meter wiring diagram
Grid
Normal
Loads
RCD
N-BAR
Main Switch/Breaker
Sunways CT
CT
Switch/Breaker
House→ Grid
No. Definition Function
1 L
L/N connect to grid to detect
power grid voltage
2 NULL
3 NULL
4 N
5 L-S1
Connect CT to detect current
6 L-S2
7 NULL
8 NULL
9 NULL
10 NULL
RS485-2 RS485 Communicate with inverter
Figure 4-36 Meter terminals definition
Meter terminals definition as shown in table 4-36:
Please refer to chapter 4.4.2 for the communication between Meter and inverter.
567
910
8
RS485-2
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