Sungrow SG4950HV-MV, Системное руководство

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7.2 Requirements of Commissioning
Before commissioning, installation of the modules and the intelligent PMD inside the MV
Station should be checked thoroughly.
•
Ensure all cables are connected securely and all bolts are fixed properly.
•
Ensure DC side voltage meets module requirements and the polarity is correct.
•
Ensure AC side voltage meets module requirements.
•
Ensure all cable connections meets related standards and requirements.
•
Ensure the system is properly grounded. Ground resistance is important for the
whole system so that before commissioning, make sure the ground resistance is less
than 4Ω.
Make sure the emergency stop button inside the monitoring window is released,
all AC & DC switches are disconnected and all micro-circuit breakers inside the
intelligent PMD are disconnected before commissioning.
All commissioning operations must be performed only by qualified personnel.
Commission the device when it is sunny and the environmental conditions are
stable to ensure the successful commissioning.
7.3 Checking before Commissioning
7.3.1 Checking the Cable Connection
•
Check cables for any possible damages or cracks.
•
Check that all cables are connected securely according to the cable connection
diagram. Adjust the cable connection if necessary.
•
Ensure all cable connections are firmly enough. Fix the bolts if necessary.
•
Check the PE equipotential connection. Ensure the module AC side PE ground
copper bar has connected to the equipotential connection point in the electrical
room and properly grounded. The ground resistance should be no more than 4Ω.
7.3.2 Checking the Module
•
Ensure that the DC and AC switches are in the “OFF” position.
•
Check whether the electric switches and buttons of the MV Station and its upstream
and downstream devices can be operated flexibly.
System Manual 7 Commissioning