103
Without our confirmation, do not replace the fuse with the one from another
manufacturers or of a different model.
Otherwise, Sungrow shall not be responsible for any possible personal injury or
property damage.
12.5.2.1 DC Fuse Area
The DC cabinet inside the MV Station is equipped with DC fuses.
Before replacing the fuses, remove protective grid installed at the DC fuse area at the
bottom of the DC cabinet.
12.5.2.2 Operations before Replacement
Follow the procedure below to replace the fault fuse.
step 1
Stop the MV Station via the stop instruction on the LCD screen.
step 2
Disconnect DC output switches of all PV array combiner boxes upstream.
step 3
Disconnect the DC and AC side switches of the MV Station and auxiliary power supply
switches, and perform Step 4 about 20 minutes later when the capacitor inside the
machine discharges completely.
step 4
Use a multimeter with a measuring range of 1500Vdc to check whether voltages of the
connection terminal on the DC side of the MV Station are zeros, where the voltages
include the voltage between the positive and negative poles, the positive to ground
voltage, and the negative to ground voltage.
step 5
Open the left door with the key and remove the protective grid in the DC fuses area.
step 6
Measure each DC input voltage by using the multimeter, and perform the next step after
ensuring the wiring terminal is completely voltage-free.
step 7
Replace the fault fuse.
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System Manual
Содержание SG4950HV-MV
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