Sungrow SG8K3-D - Regular Operational Frequency Range

2 Product Introduction User Manual
12
Tab. 2-4 Disconnection related to Voltage
Voltage Level at Grid-connected
Point (% related to Local Nominal
Voltage)
Maximum Time to Disconnect
(1)
V < 95 %
0.16 s
(2)
95 % <= V <= 105 %
Normal operation
V > 105 %
0.16 s
(2)
When the voltage level is out of the operational levels shown in the table, the
inverter will disconnect from the grid.
If a disturbance lasts less than the required disconnection time, the inverter can
reconnect to the grid if the voltage level goes back to normal levels after the
disturbance.
Remarks:
(1) The maximum time to disconnect refers to the interval between the
abnormal voltage level and the action of inverter (disconnect from the grid).
(2) After the low / high voltage, the inverter will only reconnect to the grid again
when the grid voltage returns to normal operation range, respecting the
reconnection waiting time of 300 seconds.
2.4.4 Regular Operational Frequency Range
For Country Brazil (Code “BRA”)
Nominal frequency of Brazilian grid is 60 Hz.
The inverters can operate within the frequency limits defined in the following
table.
Tab. 2-5 Disconnection related to Frequency
Grid Frequency Level Maximum Time to Disconnect
(1)
f < 57.5 Hz
0.2 s
57.5 Hz <= f <= 62 Hz
Normal operation
(2)
f > 62 Hz
0.2 s
(3)
When the frequency level is out of the operational levels shown in the table, the
inverter will disconnect from the grid.
Remarks:
(1) The maximum time to disconnect refers to the interval between the
abnormal frequency level and the action of inverter (disconnect from the
grid).
(2) After the low frequency, the inverter will only reconnect to the grid again
when the frequency returns to 59.9 Hz, respecting the reconnection waiting
time of 300 seconds. When the grid frequency is more than 60.5 Hz and less