7.7.3
Setting guidelines
SEMOD174968-1 v1
SEMOD154558-7 v4
GlobalBaseSel: Selects the global base value group used by the function to define (IBase),
(
UBase) and (SBase).
PilotMode: Set PilotMode to On when pilot scheme is to be used. In this mode fault inception
function will send a block signal to remote end to block the overreaching zones, when
operated.
DeltaI: The setting of DeltaI for fault inception detection is by default set to 10% of IBase,
which is suitable in most cases.
Delta3I0: The setting of the parameter Delta3I0 for fault inception detection is by default set
to 10% of
UBase, which is suitable in most cases.
DeltaU: The setting of DeltaU for fault inception detection is by default set to 5% of IBase,
which is suitable in most cases.
Delta3U0: The setting of Delta3U0 for fault inception detection is by default set to 5% of
UBase, which is suitable in most cases.
Zreach: The setting of Zreach must be adopted to the specific application. The setting is used
in the SIR calculation for detection of high SIR.
SIRLevel: The setting of the parameter SIRLevel is by default set to 10. This is a suitable setting
for applications with CVT to avoid transient overreach due to the CVT dynamics. If magnetic
voltage transformers are used, set
SIRLevel to 15 the highest level.
IMinOp: The minimum operate current for the SIR measurement is by default set to 20% of
IBase.
7.8
Faulty phase identification with load encroachment
FMPSPDIS
SEMOD153819-1 v5
7.8.1
Identification
SEMOD155879-2 v3
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Faulty phase identification with load
encroachment for mho
FMPSPDIS
S00346 V1 EN-US
21
7.8.2
Application
SEMOD154764-4 v6
The operation of transmission networks today is in many cases close to the stability limit. Due
to environmental considerations the rate of expansion and reinforcement of the power system
is reduced for example, difficulties to get permission to build new power lines.
The ability to accurately and reliably classifying different types of fault so that single pole
tripping and autoreclosing can be used which plays an important roll in this matter.
Faulty phase identification with load encroachment for mho (FMPSPDIS) function is designed
to accurately select the proper fault loop in the Distance protection function dependent on the
fault type.
1MRK 505 343-UEN B
Section 7
Impedance protection
263
Application manual
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