ABB RELION REX640, Техническое руководство, Страница: 1046 / 1960

4.7.5.10 Technical data
Table 979: DNZPDIS Technical data
Characteristics Value
Operation accuracy At the frequency f = f
n
±3% of the set value or ±0.05 Ω (When |∠Z
2
- ∠RCA| is outside 80 to
100 degree)
Start time
1, 2, 3
<75 ms
Operate time accuracy
3
±1.0% of the set value or ±20 ms
Reset ratio 0.96
Reset time Typically 30 ms
4.7.6 Power swing detection DSTRPSB (ANSI 68)
4.7.6.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Power swing detection DSTRPSB Zpsb 68
4.7.6.2 Function block
Figure 583: Function block
4.7.6.3 Functionality
The power swing detection function DSTRPSB detects power swing condition
and can be used for blocking the distance protection function. The power swing
detection function comprises an inner and an outer impedance characteristic.
The supported zone characteristic shapes for inner and outer characteristic are
quadrilateral and mho (circular). The power swing detection function is supervised
by a load encroachment logic which ensures that the load impedance does not
enter the characteristic of the power swing detection function during normal power
system operation.
1
Results based on statistical distribution of 1000 measurements
2
Measured with static signal output (SSO)
3
During fault, Z
2
= 2.0 ×
Ng Seq impedance Rv/Fw
Protection functions 1MRS759142 F
1046 REX640
Technical Manual