Sungrow SG125HV-30, User Manual

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1 Product Description User Manual
12
Turn the DC switch to the
“OFF” position to stop the inverter when a fault occurs
or when you need to stop the inverter.
Turn the DC switch to the
“ON” position before restarting the inverter.
1.2.6 AC Switch
The AC switch is used to disconnect the inverter from the AC grid. Turn the
switch to the OFF position and the inverter disconnects from the AC grid.
Turn the AC switch to the ON position before restarting the inverter.
1.3 Technical Description
1.3.1 Circuit Diagram
Fig. 1-5 shows the main circuit of the inverter.
The MPPT is utilized for DC input to ensure the maximum power from the PV
array at different PV input conditions.
The inversion circuit converts the DC power into AC power and feeds the AC
power to the utility grid through the AC terminal. The protection circuit is
equipped to ensure the safe operation of the device and personal safety.
The DC switch is used to disconnect the DC current safely. The inverter provides
standard RS485 ports for communication. Users can also check running data
and set related parameters via the iSolarCloud APP.
L1
PE
L2
L3
AC SPD
Inverter Circuit
(DC/AC)
AC
Filter
AC
Relays
AC EMI
Filter
AC
Switch
DC
DC Switch
D C EMI
Filter
DC Bus
Fig. 1-5 Circuit diagram of SG125HV-30