Goodwe Smart Meter GMK330 Manual De Instrucciones página 82

Connect CT cables
• Only applicable to GM330.
• Prepare the CT. Or contact the device manufacturer for purchasing.
• Specifications of the CT:
1. 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.)
2. 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%.
• The CT bore diameter shall be bigger than the outer diameter of AC power cable, to ensure
the AC power cable can be inserted through CT.
The dimension and appearance of the CT differs slightly according to its type provided by the
device manufacturer. However, the installation and wiring methods are the same.
Example CT1
The recommended conductor cross-sectional area of the CT's secondary output cable:
1.6mm² (15AWG cable).
Direction of
the current
House
L1/L2/L3
Quick Installation Guide V1.2 -2023 -07-15
NOTICE
Grid
80
GM330