ABB Relion 650 Series Technical Manual page 149

1MRK 506 326-UUS B
5.7.6.3 Reactive reach in forward and reverse direction
The inner characteristic for the reactive reach in forward direction correspond to the setting
parameter
where:
RLdOutFw - KLdRFw · RLdOutFw
DFw =
The inner characteristic for the reactive reach in reverse direction correspond to the setting
parameter
where:
RLdOutRv - KLdRRv · RLdOutRv
DRv =
5.7.6.4 Basic detection logic
The operation of the Power swing detection ZMRPSB (68) is only released if the magnitude of the
current is above the setting of the min operating current,
• The
phases. Figure
particular phase.
Signals ZOUT_n (outer boundary) and ZIN_n (inner boundary) in figure
operation of the impedance measuring elements in each phase separately (
corresponding A, B and C). They are internal signals, calculated by ZMRPSB (68) function.
tP1 timer in figure
The
as the later swings are. The
swings, if the measured impedance exit the operate area and returns within the time delay, set on
tW waiting timer. The upper part of figure
the
and tP-timers) are duplicated for phase B and C. All
settings.
Line distance protection REL650
Technical manual
X1InFw and the outer boundary is defined as X1InFw + DFw,
X1InRv for the inner boundary and the outer boundary is defined as X1InRv + DRv.
1 out of 3 operating mode is based on detection of power swing in any of the three
80 presents a composition of an internal detection signal DET-A in this
80 serve as detection of initial power swings, which are usually not as fast
tP2 timer become activated for the detection of the consecutive
© Copyright 2011 ABB Power Grids. All rights reserved
IMinPUPG .
80 (internal input signal ZOUT_A, ZIN_A, AND-gates
tP1 and tP2 timers in the figure have the same
Section 5
Impedance protection
M13877-20 v3
M13877-24 v5
80 are related to the
n represents the
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