SOLIS 4G series - Page 35

6. Operation
User Manual
34
There are 5 option under this setting:
1.LVRT_CQC 2.LVRT.GN3.LVRT-BARare not used for the US,
The function VRT_US (voltage ride through) and FRT_US (frequency ride through) two
operation is used for UL1741SB(seeTable6.2,Table6.3).
Selecting the setting to RUN will enable the inverter grid protection limits of UL 1741 SB
requirements. Selecting the STOP setting will enable the inverter grid protection limits
of IEEE 1547 requirements. The default setting is STOP.
6.5.7.8 V/FRT Set
The voltage and frequency ride through limit is fixed.
Figure 6.23 V/FRT Set
VRT_US:STOP
FRT_US:STOP
Table 6.3 Frequency ride through
Table 6.4 Voltage ride through
Voltage range
(p.u.)
Operating mode/response
Minimum ride-through
time(s)
(design criteria)
Minimum response
time(s)
(design criteria)
V＞1.20
1.10＜V≤1.20
Cease to Energize
Monmentary Cessation
Continuous Operation
Mandatory Operation
Momentary Cessation
N/A
12
Infinite
20
10
0.16
0.083
Mandatory Operation
0.083
N/A
N/A
N/A
1
0.88＜V≤1.10
0.70＜V≤0.88
0.50＜V≤0.70
V≤0.50
Shall trip
function
Default settings Ranges of allowable settings
Frequency
(Hz)
Clearing time
(s)
Clearing time
(s)
Frequency
(Hz)
OF2
OF1
UF1
UF2
62.0
61.2
58.5
56.5
0.16
300.0
300.0
0.16
61.8-66.0
61.0-66.0
50.0-59.0
50.0-57.0
0.16-1000.0
180.0-1000.0
180.0-1000
0.16-1000