Goodwe GM3000C Guía De Instalación Rápida página 71

Quick Installation Guide V1.0 -2022 -11-09
Connect CT cables
• Requirements for the external CT specifications:
1. Choose nA/5A for the current transformation ratio of the external CT. (n: CT primary
input current value between 200 - 5000, which is chosen by the user according to
the actual conditions.
5A: CT secondary output current.)
2. Sampling error for the CT current ≤ 1% (0.5, 0.5s, 0.2, 0.2s is recommended).
3. CT bore size must be greater than the outer diameter of AC power line to make sure
the AC power line can be inserted through CT.
4. It is recommended to choose the CT with 16AWG cable.
5. See the instructions provided by the respective manufacturer for specific CT
wirings to ensure that the direction of the connections is correct and that they are
functioning properly.
• An incorrect inlet or direction from the external CT to the meter cable can cause
damage to the device or incorrect acquisition of data.
• Do not tamper with the cables that are pre-installed with the meter.
• The direction of the external CT is from P1 end to P2 end, and the corresponding AC
power line direction is from inverter side to grid side.
• It is recommended to add an overcurrent protection device (rated current 0.5A) to the
voltage input terminal (L1/L2/L3) of the meter.
S1
S2
P2
2
NOTICE
S1
S2
P2
4
69
S1
S2
P2