ABB REX640 Product Manual page 77

REX640
Product version: 1
Table 154. Stabilized and instantaneous differential protection for two- or three-winding transformers (TR3PTDF) main settings
Parameter
High operate value
Low operate value
Slope section 2
End section 2
Restraint mode
Start value 2.H
Start value 5.H
Stop value 5.H
Slope section 3
Current group 3 type
Zro A elimination
Phase shift Wnd 1-2
Phase shift Wnd 1-3
Table 155. Stabilized and instantaneous differential protection for two-winding transformers (TR2PTDF)
Characteristic
Operation accuracy
1)2)
Operate time
Reset time
Reset ratio
Suppression of harmonics
1) Current before fault = 0.0 × I , f
n
2) Measured with static power output. f
ABB
Function
TR3PTDF
TR3PTDF
TR3PTDF
TR3PTDF
TR3PTDF
TR3PTDF
TR3PTDF
TR3PTDF
TR3PTDF
TR3PTDF
TR3PTDF
TR3PTDF
TR3PTDF
Low stage
High stage
= 50 Hz. Injected differential current = 2.0 × set operation value
n
= 50 Hz
n
Value (Range)
500...3000 %Ir
5...50 %Ir
10...50%
100...500 %Ir
5 = Waveform
6 = 2.h + waveform
8 = 5.h + waveform
9 = 2.h + 5.h + wav
7...20%
10...50%
10...50%
10...100%
1 = Not in use
2 = Winding 3
3 = Wnd 1 restraint
4 = Wnd 2 restraint
1 = Not eliminated
2 = Winding 1
3 = Winding 2
4 = Winding 1 and 2
5 = Winding 3
6 = Winding 1 and 3
7 = Winding 2 and 3
8 = Winding 1, 2, 3
0.0...359.9°
0.0...359.9°
Value
Depending on the frequency of the measured current: f
±3.0% of the set value or ±0.002 × I
Minimum Typical
31 ms 35 ms
15 ms 17 ms
<40 ms
Typically 0.96
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5, ...
n
1MRS759144 A
Step
10
1
1
1
-
1
1
1
1
-
-
0.1
0.1
±2 Hz
n
n
Maximum
40 ms
20 ms
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