function of each particular zone can be inhibited by setting the corresponding Operation
parameter to OffDisable-Zone.
Different time delays are possible for the phase-to-groundtLG and for the phase-to-phase
tPP measuring loops in each distance protection zone separately, to further increase the
total flexibility of a distance protection.
In the case of evolving faults or momentary current transformer saturation conditions, the
pick up of the zones may get delayed. Zone timer logic improves the operating time in such
conditions. The zone timer logic can be set using the parameter ZnTimerSel. The
triggering signal of phase-to-ground and phase-to-phase timers can be selected using
ZnTimerSel.
8.5 Full-scheme distance protection, quadrilateral for earth
faults ZMMPDIS (21), ZMMAPDIS (21)
8.5.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Fullscheme distance protection,
quadrilateral for earth faults (zone 1)
ZMMPDIS
S00346 V1 EN
21
Fullscheme distance protection,
quadrilateral for earth faults (zone 2-5)
ZMMAPDIS
S00346 V1 EN
21
8.5.2 Application
8.5.2.1 Introduction
Sub transmission networks are being extended and often become more and more complex,
consisting of a high number of multi-circuit and/or multi terminal lines of very different
lengths. These changes in the network will normally impose more stringent demands on
the fault clearing equipment in order to maintain an unchanged or increased security level
of the power system.
Section 8 1MRK 506 369-UUS -
Impedance protection
278 Line distance protection REL670 2.2 ANSI
Application manual
To Next Page
Loading...
