parameter ZnTimerSel. The triggering signal of phase-to-earth and phase-to-phase
timers can be selected using ZnTimerSel.
8.5 Full-scheme distance protection, quadrilateral for
earth faults ZMMPDIS, ZMMAPDIS
SEMOD154561-1 v2
8.5.1 Identification
SEMOD154542-2 v2
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-US
21
Fullscheme distance protection,
quadrilateral for earth faults (zone 2-5)
ZMMAPDIS
S00346 V1 EN-US
21
8.5.2 Application
SEMOD154697-1 v1
8.5.2.1 Introduction
SEMOD154680-4 v2
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.
The distance protection function in IED is designed to meet basic requirements for
application on transmission and sub transmission lines (solid earthed systems)
although it also can be used on distribution levels.
8.5.2.2 System earthing
SEMOD154680-11 v2
The type of system earthing plays an important roll when designing the protection
system. In the following some hints with respect to distance protection are
highlighted.
Solid earthed networks
SEMOD154680-14 v3
In solid earthed systems the transformer neutrals are connected solidly to earth
without any impedance between the transformer neutral and earth.
1MRK 506 369-UEN B Section 8
Impedance protection
Line distance protection REL670 2.2 IEC 261
Application manual
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