ABB Relion 650 Series Technical Manual page 146

Section 5
Impedance protection
Name Values (Range)
kLdRFw 0.50 - 0.90
kLdRRv 0.50 - 0.90
IMinPUPG 5 - 30
Table 51: ZMRPSB (68) Group settings (advanced)
Name Values (Range)
tP1 0.000 - 60.000
tP2 0.000 - 60.000
tW 0.000 - 60.000
tH 0.000 - 60.000
tR1 0.000 - 60.000
tR2 0.000 - 60.000
Table 52: ZMRPSB (68) Non group settings (basic)
Name Values (Range)
GlobalBaseSel 1 - 6
5.7.6 Operation principle
Power swing detection (ZMRPSB ,68) function comprises an inner and an outer quadrilateral
measurement characteristic with load encroachment, as shown in figure 79.
Its principle of operation is based on the measurement of the time it takes for a power swing
transient impedance to pass through the impedance area between the outer and the inner
characteristics. Power swings are identified by transition times longer than a transition time set
on corresponding timers. The impedance measuring principle is the same as that used for the
distance protection zones. The impedance and the characteristic passing times are measured in
all three phases separately.
140
Unit Step
Mult 0.01
Mult 0.01
%IB 1
Unit Step
s 0.001
s 0.001
s 0.001
s 0.001
s 0.001
s 0.001
Unit Step
- 1
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Default Description
0.75 Multiplication factor for inner resistive
load boundary, forward
0.75 Multiplication factor for inner resistive
load boundary, reverse
10 Minimum operate current in % of IBase
Default Description
0.045 Timer for detection of initial power swing
0.015 Timer for detection of subsequent power
swings
0.250 Waiting timer for activation of tP2 timer
0.500 Timer for holding power swing PICKUP
output
0.300 Timer giving delay to inhibit by the
residual current
2.000 Timer giving delay to inhibit at very slow
swing
Default Description
1 Selection of one of the Global Base Value
groups
1MRK 506 326-UUS B
M13877-4 v4
Line distance protection REL650
Technical manual