Goodwe SDT Series User Manual page 39

User Manual V1.3-2024-01-25
1. The place to snap fit the CT shall be near the grid connection point and the installation
direction must be right. "-->" of CT refers that the inverter current flows to the Grid. If CT
is installed reversely, the inverter will be triggered with an alarm and unable to realize the
power limit function.
2. The CT bore diameter shall be bigger than the outer diameter of AC power cable, to ensure
the AC power cable can be inserted into CT.
3. For specific CT wirings, please refer to the documents provided by the respective
manufacturer, to ensure that the wiring direction is correct and CT is able to work properly.
4. CT shall be snap fitted on Cable L1, L2 and L3. Do not install it on Cable N.
5. Specification of CT:
• Choose nA/5A for the current transformation ratio of the CT. (nA: For primary current
of the CT, n ranges from 200 to 5000.Set the current value depending on the actual
needs.5A: The output current of the secondary current of the CT.)
• The recommended precision of the CT: 0.5, 0.5s, 0.2, 0.2s. Ensure the sampling error for
the CT current shall be ≤ 1%.
6. To ensure the current detection accuracy of the CT, it is recommended that the length of
the CT cable should not exceed 30 m.
1. Recommended cross-sectional area of the smart meter input power cable: 1mm2(18AWG).
2. Set the CT 's turns ratio via SolarGo App. For example, set the CT ratio to 40 if a 200A/5A CT is
selected.
3. Scan the QR code below to get more information.
Inverter
-
+
WARNING
SolarGo App
User Manual
RS485 B
RS485 A
L3
L2
L1
N
Load
Circuit
Breaker
NOTICE
CT3
CT2
CT1
A
1 1 1 2 2 2
RESET RESET RESET
N
L1 L3
L2
35
06 Electrical Connection
Meter
L3
L2
L1
N
Grid
B
GM330