ABB 650 series, Technical Manual

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Name Values (Range) Unit Step Default Description
kLdRFw 0.50 - 0.90 Mult 0.01 0.75 Multiplication factor for inner resistive load
boundary, forward
kLdRRv 0.50 - 0.90 Mult 0.01 0.75 Multiplication factor for inner resistive load
boundary, reverse
IMinOpPE 5 - 30 %IB 1 10 Minimum operate current in % of IBase
Table 53: ZMRPSB (68) Group settings (advanced)
Name Values (Range) Unit Step Default Description
tP1 0.000 - 60.000 s 0.001 0.045 Timer for detection of initial power swing
tP2 0.000 - 60.000 s 0.001 0.015 Timer for detection of subsequent power
swings
tW 0.000 - 60.000 s 0.001 0.250 Waiting timer for activation of tP2 timer
tH 0.000 - 60.000 s 0.001 0.500 Timer for holding power swing PICKUP output
tR1 0.000 - 60.000 s 0.001 0.300 Timer giving delay to inhibit by the residual
current
tR2 0.000 - 60.000 s 0.001 2.000 Timer giving delay to inhibit at very slow swing
Table 54: ZMRPSB (68) Non group settings (basic)
Name Values (Range) Unit Step Default Description
GlobalBaseSel 1 - 6 - 1 1 Selection of one of the Global Base Value
groups
7.1.6 Operation principle
Power swing detection (ZMRPSB ,68) function comprises an inner and an outer
quadrilateral measurement characteristic with load encroachment, as shown in figure
62 .
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.
1MRK 502 048-UUS A
Section 7
Impedance protection
153
Technical manual