Goodwe GM3000 User Manual

5
Power Limit Solution for Grid-Tied PV Inverters User Manual V1.0-2022-09-15
2.4 Three-Phase Inverter + GM3000C Networking
Inverter
Load
External CT
Utility Grid
Meter
PV String
GM3000C
System with Single Inverter
No. Parts Description
1 Inverter Applicable inverters are SDT G2 series, SMT series, MT series and HT 1100V series.
2 GM3000C Prepare CT by yourself for external installation when selecting 3000C smart meter. Specication of CT:
1. Choose nA/5A for the current transformation ratio of the external CT. (n refers to CT primary input current
value, which is between 200 - 5000, chosen by the user according to the actual conditions. 5A refers to CT
secondary output current value.)
2. The sampling error for the CT current shall be ≤ 1% (the recommended precision is 0.5, 0.5s, 0.2, or 0.2s).
3. The recommended wire diameter for the CT secondary output cable is 1.5mm, corresponding to 1.5mm²
in cross-sectional area.
3 Load The load current of any phase shall be more than 120A.
WARNING
1. The place to snap t the CT shall be near the entry point in the right direction. “-->” of CT refers that the inverter current ows 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 appearances of the inverter and its CT wiring port vary according to dierent types. Please refer to the related inverter’s
user manual or quick installation guide for specic CT wiring.
3. 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.
4. For specic 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.
5. CT shall be snap tted on Cable L1, L2 and L3. Do not install it on Cable N.
Wiring Description
Parts Description

Goodwe GM3000 Specifications

General

Brand	Goodwe
Model	GM3000
Category	Measuring Instruments
Language	English