Sungrow SG4950HV-MV, Системное руководство

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Measure and record the grid frequency. Measured datas should not exceed the grid
permissible frequency.
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Measure the THD and check the curve if possible. Module will stop running if the
THD is serious.
•
Record accurately all the measured datas.
7.4 Preparation before Starting
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Place the disassembled protection grills to their original positions and ensure the
connection is secure.
•
Close and lock the cabinet door.
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Clean the device site. Make sure the position is clean without flammable or explosive
materials.
•
Ensure the ventilation of the installation place.
•
Recheck and ensure whether module and switches upstream and downstream can
meet the requirements flexiblely .
7.5 Starting the Device
If all tests and measurements have been performed, and all measured values lie within
the acceptable range, the device can be switched on for the first time. Proceed as
follows to start the MV Station:
step 1 Close the upstream and downstream switches of the MV Station.
step 2 Manually close the auxiliary power supply switch inside the MV Station and wait the
touch screen to power on.
step 3 Stop the MV Station through the touch screen.
step 4 Turn off “Trip” and “Door-protect enable” through the touch screen.
step 5 Manually close all DC switches inside the DC cabinet.
step 6 Perform the start operation through the touch screen, and the MV Station starts grid-
connected operation.
-- -- E En nd d
To ensure the MV Station operates normally for the first time, measure the DC
input voltage beforehand. When the DC side voltage meets the start-up
requirement, i.e., the DC voltage is steadily higher than the DC start-up voltage,
start the MV Station for the first time.
System Manual 7 Commissioning