Hysteresis value in % of range (ZMax-ZMin), common for all limits. It is used to avoid
the frequent update of the value for the attribute “range”.
ZMax
Estimated maximum impedance value. An impedance that is higher than ZMax has the
quality attribute as “Out of Range”.
ZMin
Estimated minimum impedance value. An impedance that is lower than ZMin has the
quality attribute as “Out of Range”.
8.13 High speed distance protection for series
compensated lines ZMFCPDIS
(21)
GUID-ED71CF5A-1453-4F2F-9C64-3A73C59EA948 v4
8.13.1 Identification
GUID-0F03DA72-0687-4762-91CB-EC8E59B86E06 v2
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
High speed distance protection zone
(zone 1-6)
ZMFCPDIS
S00346 V1 EN-US
21
8.13.2 Application
IP14961-1 v2
GUID-12188AB4-5922-428B-86F5-5F3897D29807 v3
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 high speed distance protection function (ZMFCPDIS) in the IED is designed to
provide sub-cycle, down to half-cycle operate time for basic faults. At the same time, it
is specifically designed for extra care during dif
ficult conditions in high voltage
transmission networks, like faults on long heavily loaded lines and faults generating
heavily distorted signals. These faults are handled with outmost security and
dependability, although sometimes with reduced operating speed.
Section 8 1MRK 504 163-UUS A
Impedance protection
396 Transformer protection RET670 2.2 ANSI
Application manual
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