Table 132. Out-of-step protection OOSRPSB
Characteristic
Value
Impedance reach
Depending on the frequency of the measured current and voltage: f
n
±2
Hz
±3.0% of the reach value or ±0.2% of U
n
/(√3 ⋅ I
n
)
Reset time
±1.0% of the set value or ±40 ms
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 133. Out-of-step protection (OOSRPSB) main settings
Parameter
Function
Value (Range)
Step
Oos operate mode
OOSRPSB
1 = Way in
2 = Way out
3 = Adaptive
-
Forward reach
OOSRPSB
0.00...6000.00 Ω
0.01
Reverse reach
OOSRPSB
0.00...6000.00 Ω
0.01
Inner blinder R
OOSRPSB
1.00...6000.00 Ω
0.01
Outer blinder R
OOSRPSB
1.01...10000.00 Ω
0.01
Impedance angle
OOSRPSB
10.0...90.0°
0.1
Swing time
OOSRPSB
20...300000 ms
10
Zone 1 reach
OOSRPSB
1...100%
1
Operate delay time
OOSRPSB
20...60000 ms
10
Table 134. Negative-sequence overcurrent protection for machines (MNSPTOC)
Characteristic
Value
Operation accuracy
Depending on the frequency of the measured current: f
n
±1.5% of the set value or ±0.002 x I
n
Start time
1)2)
Minimum
Typical
Maximum
I
Fault
= 2.0 × set
Start value
23
25 ms
28 ms
Reset time
Typically 40 ms
Reset ratio
Typically 0.96
Retardation time
<35 ms
Operate time accuracy in definite time mode
±1.0% of the set value or ±20 ms
Operate time accuracy in inverse time mode
±5.0% of the theoretical value or ±20 ms
3)
Suppression of harmonics
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
1)
Negative-sequence current before = 0.0, f
n
= 50 Hz, results based on statistical distribution of 1000 measurements
2)
Includes the delay of the signal output contact
3)
Start value multiples in range of 1.10...5.00
1MRS759144 A
REX640
Product version: 1
ABB
71
Summary of Contents for RELION REX640
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