Sungrow SG100K3, Installation Manual

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5 5. Commissioning
Chapter 3 describes the procedures needed to verify whether your installation of
the SG100K3 is correct and how to start the inverter for the first time.
5.1. Visual Inspection
To perform a visual inspection of theSG100K3:
1. Inspect the polarity of PV input connections are correct.
2. Check all the mechanical connections and make sure there is no damage,
scratch or abnormal parts
3. Check all the electrical connections and secure the wiring terminals.
4. Check all the wiring of AC and DC sides are connected to the correct
terminals with correct rating wires.
5. Make sure all the bolts that fix the wires are tightened and secured.
5.1.1. AC Connection Check
It must be verified that the inverter is connected to the correct grid type and
that a right-hand rotary field exists on L
1
, L
2
, L3 and Neutral. The value of
the AC line to line voltage should be about 400 V.
5.1.2. DC Connection Check
The DC connections are from the DC combiner boxes to the inverter.
The voltage on the individual DC wires should be almost the same value
and must never exceed the allowable maximum DC voltage.
Besides the voltage values, the polarity of the DC inputs must also be
verified. all DC connections should be checked to ensure that
they are mechanically tight.
5.1.3. Ground Connection Check
Make sure the ground wire goes through the hole of the ground fault
detection device and connected to the ground copper bar securely.
5.1.4. Serial Communication Check (Optional)
For external communication monitoring, the data wires must be connected.
Make sure that the RS485 A and B wires are connected correctly and tightened
to the RS485/232 converter.
Make sure the RS485/232 converter DB9 terminal is correctly connected to
the PC DB9 serial port.
5.2. Start the Inverter