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8 Commissioning
8.1
Commissioning Requirements
Before commissioning, all installations should be checked thoroughly again.
Ensure all the cable connections are secure and all bolts are fixed properly.
Ensure DC side voltage meets inverter requirements and the polarity is correct.
Ensure AC side voltage meets inverter requirements.
Ensure all cable connections meet related standards and requirements.
Ensure the system is properly grounded. The grounding resistance is important for the
whole system. Therefore, before commissioning, make sure the grounding resistance
meets requirement (no more than 4
Ω).
All operation during commissioning must be performed by qualified personnel
only.
Disconnect the AC and DC switch before commissioning.
Commission the device when it is sunny and the environmental conditions are
stable to ensure the successful commissioning.
8.2
Check Before Commissioning
8.2.1
Cable Connection Check
Check all cables for damages or cracks.
Check whether all cables are connected correctly according to the cable connection
diagram. Adjust the cable connection if necessary.
Ensure all cable are firmly connected. Fix the bolts if necessary.
Check the PE equipotential connection. Ensure the inverter AC side PE ground copper
bar has connected to the equipotential connection point in the electrical room and
properly grounded. The grounding
resistance should be no more than 4Ω.
8.2.2
Inverter Check
Before the inverter is powered on, check the inverter:
Ensure that the DC and AC switches are in the "OFF" position.
Ensure the Start/Stop switch is in "STOP" position.
Ensure the emergency button is released and works normally.
