Operation Manual
7 Parameters of LCD
31
Set the protection parameter by tapping the pop-up keypad and tap ENTER to confirm setting.
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Improper parameter configuration may affect the normal operation of the inverter!
Only authorized personnel can configure these parameters.
Should any question or doubt occurs, please contact Sungrow.
7.3.2
Description of Protection Parameters
Descriptions of the protective parameters are shown in the following table.
Parameter
Description
Ⅰ
_Vgrid-max(V)
Set the grid over-voltage protection I value. Protection is
activated when voltage exceeds this value.
Ⅱ
_Vgrid-max(V)
Set the grid over-voltage protection II value. Protection is
activated when voltage exceeds this value.
Ⅰ
_T-Vhigh trip(ms)
Set the protection time of grid over-voltage protection I
Ⅱ
_T-Vhigh trip (ms)
Set the protection time of grid over-voltage protection II
Recover_Vgrid-max(V)
Inverter recovers normal operation when grid voltage is below
this value
Ⅰ
_Vgrid-min(V)
Set the grid under-voltage protection I value. Protection is
activated when voltage is below this value.
Ⅱ
_Vgrid-min(V)
Set the grid under-voltage protection II value. Protection is
activated when voltage is below this value.
Ⅰ
_T-Vlow trip(ms)
Set the grid under-voltage I tripping protection time
Ⅱ
_T-Vlow trip (ms)
Set the grid under-voltage II tripping protection time
Recover_Vgrid-min(V)
Inverter recovers normal operation when grid voltage exceeds
this value
Ⅰ
_Fgrid-max((Hz)
Set the grid over-frequency protection I value. Protection is
activated when frequency exceeds this value
Ⅱ
_Fgrid-max((Hz)
Set the grid over-frequency protection II value. Protection is
activated when frequency exceeds this value
Ⅰ
_T-Fhigh trip(ms)
Set the grid over-frequency I tripping time
Ⅱ
_T-Fhigh trip (ms)
Set the grid over-frequency II tripping time
Recover_Fgrid-max(Hz)
Inverter recovers normal operation when grid frequency is below
this value
Ⅰ
_Fgrid-min((Hz)
Set the grid under-frequency protection I value. Protection is
activated when frequency exceeds this value
Ⅱ
_Fgrid-min((Hz)
Set the grid under-frequency protection II value. Protection is
activated when frequency exceeds this value
Ⅰ
_T-Flow trip(ms)
Set the grid under-frequency I tripping time
Ⅱ
_T-Flow trip (ms)
Set the grid under-frequency II tripping time
Recover_Fgrid-min((Hz)
Inverter recovers normal operation when grid frequency exceeds
this value
LVRT switch
Enable or disable the LVRT switch
LVRT normal vol min(V)
Refer to Fig. 8-1Lower voltage withstand requirements, U1