Sungrow SG2500U-MV User Manual

System Manual 2 Safety Instructions
9
2.3.1 Safe Operation of the MV Station room
Perform the operations in this section before any operation on the MV Station
room. Physical injury or device damage may follow if otherwise.
Step 1 Identify the MV Station and read the safety instructions on the MV Station cabinet carefully.
Step 2 Disconnect all power supplies from the MV Station, including MV Station upstream and
downstream devices and other connected power supplies. In addition, place warning
signals to prevent accidental reconnection.
1. Stop the module. Wait at least 5 minutes after the MV Station is stopped. Open the
cabinet door after all the internal capacitor is discharged completely
2. Disconnect the transformer downstream switch. Disconnect other power supplies
connected to the MV Station, for example, the grid and sub-stations in parallel
connection.
3. Disconnect all DC power supply to the MV Station. Disconnect the output circuit
breakers of the MV Station upstream combiner box.
Step 3 Make sure all operation areas are voltage-free. Measure the MV Station AC and DC
connection terminals and other operational areas using multimeter to make sure they are
all voltage-free.
Step 4 Temporarily ground the AC and DC sides of the two modules by using proper temporary
grounding devices.
2.3.2 Safe Operation of the Transformer Room
Perform the operations in this section before any operation on the transformer
room. Physical injury or device damage may follow if otherwise.
Step 1 Identify the transformer and read the safety instructions on the transformer cabinet
carefully.
Step 2 Disconnect all power supplies from the transformer, including transformer upstream and
downstream devices and other connected power supplies. In addition, place warning
signals to prevent accidental reconnection.
1. Stop the module.
2. Disconnect the transformer downstream switch. Disconnect other power supplies
connected to the transformer, for example, the grid and sub-MV Stations in parallel
connection.
Step 3 Make sure all operation areas are voltage-free.
Step 4 Make sure the transformer is voltage-free. High voltage side connection terminals, low
voltage side connection terminals and all possible auxiliaries are voltage-free.
Step 5 Measure the high voltage terminal with proper high voltage tester to make sure the high
voltage side is voltage free; measure the low voltage side terminal with proper test probe to
make sure the low voltage side is voltage free.
Step 6 Ground the MV Station
1. Temporarily ground the AC side of the two modules by using proper temporary
grounding devices.
2. Turn the earthing switch to the earthed position.

Sungrow SG2500U-MV Specifications

General

Brand	Sungrow
Model	SG2500U-MV
Category	Inverter
Language	English