User Manual 2 Product Description
9
2.3.2 Regular Operational Voltage Range
The inverters can operate within the allowable voltage range for at least the
specified observation time. The setting of the conditions depends on whether
the connection is due to a normal operational start-up or an automatic
reconnection after tripping of the interface protection.
When the voltage level is out of the operational levels, the inverter will
disconnect from the grid in the protection time. If a disturbance lasts less than
the required protection time, the inverter can reconnect to the grid if the voltage
level goes back to normal levels after the disturbance.
Grid voltage, V
V1 V2 VmaxVmin Vn
Normal operation
Start-up
Standby
Standby
V3 V4Vn
Reconnection
Standby Standby
Grid voltage, V
Condition 1: initial start-up Condition 2: reconnection after protection
VmaxVmin
Normal operation
Fig. 2-5 Inverter Action related to Grid Voltage (“DE” for example)
Tab. 2-3 Operational Voltage Parameter Description
The lower voltage limit for initial start-up.
The upper voltage limit for initial start-up.
The lower voltage limit for reconnection.
The upper voltage limit for reconnection.
Minimum observation time.
Connection or recovery gradient.
Under-voltage protection value.
Over-voltage protection value.
Under-voltage protection time.
Over-voltage protection time.
Tab. 2-4 Default Values of Operational Voltage Parameter
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