ABB ABILITY SSC600 Product Manual page 25

Product Guide
SSC600
Product version: 1.0
Table 75. Stabilized and instantaneous differential protection for two-winding transformers (TR2PTDF) 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
Operation
Winding 1 type
Winding 2 type
Zro A elimination
Table 76. Numerically stabilized low-impedance restricted earth-fault protection (LREFPNDF)
Characteristic
Operation accuracy
Start time IFault = 2.0 × set Operate value
60, 61
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
Table 77. Stabilized restricted earth-fault protection (LREFPNDF) main settings
Parameter
Operate value
Minimum operate time
Restraint mode
Start value 2.H
Operation
60 Current before fault = 0.0, fn = 50 Hz, results based on statistical distribution of 1000 measurements
61 Includes the delay of the signal output contact
ABB
Function
TR2PTDF
TR2PTDF
TR2PTDF
TR2PTDF
TR2PTDF
TR2PTDF
TR2PTDF
TR2PTDF
TR2PTDF
TR2PTDF
TR2PTDF
Value
Depending on the frequency of the measured current: fn ±2 Hz
±2.5% of the set value or ±0.002 x In
Minimum
37 ms
Typically 40 ms
Typically 0.96
<35 ms
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × fn, where n = 2, 3, 4, 5, ...
Function
LREFPNDF
LREFPNDF
LREFPNDF
LREFPNDF
LREFPNDF
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%
1 = on
5 = off
1 = Y
2 = YN
3 = D
4 = Z
5 = ZN
1 = Y
2 = YN
3 = D
4 = Z
5 = ZN
1 = Not eliminated
2 = Winding 1
3 = Winding 2
4 = Winding 1 and 2
Typical
41 ms
Value (Range)
5...50 %In
40...300000 ms
1 = None
2 = Harmonic
10...50%
1 = on
5 = off
1MRS758725
Step
10
1
1
1
-
1
1
-
-
-
-
Maximum
45 ms
Step
1
1
-
1
-
25