ABB RELION REX640 Technical Manual page 903

1MRS759142 F
Figure 505: Low voltage ride through example curve B
Table 853: Settings for example A and B
Settings
Voltage start value
Active coordinates
Voltage level 1
Recovery time 1
Voltage level 2
Recovery time 2
Voltage level 3
Recovery time 3
Voltage level 4
Recovery time 4
Voltage level 5
Recovery time 5
Figure 506
to operate with
"Lowest Ph-to-Ph" voltage.
REX640
Technical Manual
It is necessary that the last active
Voltage start value . Settings are not accepted if the last
than or equal to
Voltage level X setting is not set greater than or equal to Voltage
active
start value .
describes an example of operation of LVRTPTUV protection function set
Num of start phases set to "Exactly 2 of 3" and Voltage selection as
Curve A
0.9 · Un
3
0.2 · Un
500 ms
0.8 · Un
1500 ms
0.9 · Un
10000 ms
-
-
-
-
Voltage level X setting is set greater
Protection functions
Curve B
0.9 · Un
5
0 · Un
150 ms
0.7 · Un
150 ms
0.7 · Un
700 ms
0.9 · Un
1500 ms
0.9 · Un
3000 ms
903