ABB RELION 620 Series Technical Manual page 695

1MRS757644 F
620 series
Technical Manual
Table 647: 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
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 351 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.
Protection functions
Curve A
0.9 · Un
3
0.2 · Un
500 ms
0.8 · Un
1000 ms
0.9 · Un
10000 ms
-
-
-
-
Section 4
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
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