The default setting of IMinPUPP and IMinPUPG is 20% of IBase where IBase is the
chosen current for the analogue input channels. The value has been proven in practice
to be suitable in most of the applications. However, there might be applications where
it is necessary to increase the sensitivity by reducing the minimum operating current
down to 10% of
IBase. This happens especially in cases, when the IED serves as a
remote back-up protection on series of very long transmission lines.
Setting IMinOpIR blocks the phase-to-ground loop if 3I
0
<IMinOpIR. The default
setting of IMinOpIR is 5% of IBase.
The minimum operating fault current is automatically reduced to 75% of its set value,
if the distance protection zone has been set for the operation in reverse direction.
8.9.3.10 Setting of timers for distance protection zones
GUID-E6DD460D-2189-45E9-AD4D-E127DCA8EBAC v1
The required time delays for different distance protection zones are independent of
each other. Distance protection zone 1 can also have a time delay, if so required for
selectivity reasons. Time delays for all zones can be set in a range of 0 to 60 seconds.
The tripping function of each particular zone can be inhibited by setting the
corresponding Operation parameter to Off. Different time delays are possible for the
phase-to-groundtPG 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.
8.10 Phase selection, quadrilateral characteristic with
settable angle FRPSPDIS (21)
GUID-29E9C424-5AF7-40EE-89D9-F6BB4F0A0836 v2
8.10.1 Identification
GUID-07DB9506-656C-4E5F-A043-3DAA624313C7 v2
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Phase selection, quadrilateral
characteristic with settable angle
FRPSPDIS
SYMBOL-DD V1 EN-US
21
8.10.2 Application
GUID-D07A7B62-FDB9-4728-859A-9CE7423BE128 v1
The operation of transmission networks today is in many cases close to the stability
limit. The ability to accurately and reliably classify the different types of fault, so that
single pole tripping and autoreclosing can be used plays an important role in this
1MRK 504 163-UUS A Section 8
Impedance protection
Transformer protection RET670 2.2 ANSI 345
Application manual
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