Table 48. Line differential protection with in-zone power transformer (LNPLDF) main settings
Parameter
Function
Value (Range)
Step
Low operate value
LNPLDF
10...200 % I
r
1
High operate value
LNPLDF
200...4000 % I
r
1
Start value 2.H
LNPLDF
10...50%
1
Time multiplier
LNPLDF
0.05...15.00
0.01
Operating curve type
LNPLDF
1 = ANSI Ext. inv.
3 = ANSI Norm. inv.
5 = ANSI Def. Time
9 = IEC Norm. inv.
10 = IEC Very inv.
12 = IEC Ext. inv.
15 = IEC Def. Time
-
Operate delay time
LNPLDF
45...200000 ms
1
CT ratio correction
LNPLDF
0.200...5.000
0.001
Table 49. Binary signal transfer (BSTGAPC)
Characteristic
Value
Signalling delay
Fiber optic link
<5 ms
Galvanic pilot wire link
<10 ms
Table 50. Switch-onto-fault protection (CVPSOF)
Characteristic
Value
Operation accuracy
Depending on the frequency of the voltage measured: f
n
±2Hz
Current: ±1.5% of the set value or ±0.002 × I
n
Voltage: ±1.5% of the set value or ±0.002 × U
n
Operate time accuracy
±1.0% of the set value or ±20 ms
Suppression of harmonics
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
Table 51. Switch-onto-fault protection (CVPSOF) main settings
Parameter
Function
Value (Range)
Step
SOTF reset time
CVPSOF
0...60000 ms
10
1MRS759144 A
REX640
Product version: 1
ABB
43
Содержание RELION REX640
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