ABB RELION REX640 Technical Manual page 1046

Protection functions
4.7.5.10 Technical data
Table 979: DNZPDIS Technical data
Characteristics
Operation accuracy
Start time
Operate time accuracy
Reset ratio
Reset time
4.7.6 Power swing detection DSTRPSB (ANSI 68)
4.7.6.1 Identification
Function description
Power swing detection
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 = 2.0 ×
2
1046
Value
At the frequency f = f
±3% of the set value or ±0.05 Ω (When |∠Z
100 degree)
1, 2, 3
<75 ms
3
±1.0% of the set value or ±20 ms
0.96
Typically 30 ms
Ng Seq impedance Rv/Fw
n
IEC 61850 IEC 60617
identification identification
DSTRPSB Zpsb
1MRS759142 F
- ∠RCA| is outside 80 to
2
ANSI/IEEE C37.2
device number
68
REX640
Technical Manual