Table 46. Current reversal and weak-end infeed logic for residual overcurrent (RCRWPSCH) main settings
Parameter Function Value (Range) Step
Reversal mode RCRWPSCH 1 = Off
2 = On
-
Wei mode RCRWPSCH 1 = Off
3 = Echo
4 = Echo and Operate
-
Residual voltage Val RCRWPSCH 0.05...0.70 × U
n
0.01
Reversal time RCRWPSCH 0...60000 ms 10
Reversal reset time RCRWPSCH 0...60000 ms 10
Wei Crd time RCRWPSCH 0...60000 ms 10
Table 47. Line differential protection with in-zone power transformer (LNPLDF)
Characteristics
Value
Operation accuracy
1)
Depending on the frequency of the measured current: f
n
±2 Hz
Low stage ±2.5% of the set value
High stage ±2.5% of the set value
High stage, operate time
2)3)
Minimum Typical Maximum
20 ms 23 ms 27 ms
Reset time Typically 40 ms
Reset ratio Typically 0.96
Retardation time <40 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 set value or ±20 ms
4)
Suppression of harmonics RMS: No suppression
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
Peak-to-Peak: No suppression
1) With the symmetrical communication channel (as when using dedicated fiber optic).
2) Without additional delay in the communication channel (as when using dedicated fiber optic).
3) Measured with static power output. When differential current = 2 ×
High operate value
and f
n
= 50 Hz with galvanic pilot wire link + 5 ms.
4)
Low operate value
multiples in the range of 1.5...20
1MRS759144 A
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