ABB RELION REX640, Техническое руководство, Страница: 903 / 1960

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