The default setting of IMinPUPP and IMinPUPG is 20% of IBase where IBase is the
chosen base current for the analog 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 IED base current. This happens especially in cases,
when the IED serves as a remote back-up protection on series of very long
transmission lines.
If the load current compensation is activated, there is an additional criteria IMinOpIR
that will block the phase-
ground loop if the 3I0<IMinOpIR. The default setting of
IMinOpIR is 5% of the IED base current 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.
8.1.3.11 Setting of timers for distance protection zones
SEMOD168247-138 v2
The required time delays for different distance-protection zones are independent of
each other. Distance protection zone1 can also have a time delay, if so required for
selectivity reasons. One can set the time delays for all zones (basic and optional) 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 Disabled. Different time delays
are possible for the ph-E (tPG) and for the ph-ph (tPP) measuring loops in each
distance protection zone separately, to further increase the total flexibility of a distance
protection.
8.2 Phase selection, quad, fixed angle, load
encroachment FDPSPDIS (21)
IP12400-1 v4
8.2.1 Identification
8.2.1.1 Identification
M14850-1 v6
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Phase selection, quad, fixed angle,
load encroachment
FDPSPDIS
SYMBOL-DD V1 EN-US
21
Section 8 1MRK 504 163-UUS A
Impedance protection
248 Transformer protection RET670 2.2 ANSI
Application manual
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