ABB Relion 650 Series Technical Manual page 124

Section 5
Impedance protection
Function
Dynamic overreach
Timers
Operate time
Reset ratio
5.4 Faulty phase identification with load enchroachment for
mho FMPSPDIS
5.4.1 Identification
Function description
Faulty phase identification with load
encroachment for mho
5.4.2 Functionality
The phase selection function is design to accurately select the proper fault loop(s) in the distance
function dependent on the fault type.
The heavy load transfer that is common in many transmission networks may in some cases
interfere with the distance protection zone reach and cause unwanted operation. Therefore the
function has a built in algorithm for load encroachment.
The output signals from the phase selection function produce important information about faulty
phase(s), which can be used for fault analysis as well.
5.4.3 Function block
I3P*
V3P*
BLOCK
ZPICK UP
TR3PH
ANSI09000154 V1 EN-US
Figure 66: FMPSPDIS (21) function block
118
Range or value
<5% at 85 degrees
measured with CVT's and
0.5<SIR<30
(0.000-60.000) s
30 ms typically
less than 105%
FMPSPDIS
PICKUP
PU_A
PU_B
PU_C
PHG_FLT
PHSCND
DLECND
PU_BLF
ANSI09000154-1-en.vsd
© Copyright 2011 ABB Power Grids. All rights reserved
Accuracy
-
± 0.5% ± 10 ms
-
-
IEC 61850 IEC 60617
identification identification
FMPSPDIS
S00346 V1 EN-US
1MRK 506 326-UUS B
ANSI/IEEE C37.2
device number
-
Line distance protection REL650
Technical manual
SEMOD153819-1 v4
SEMOD155879-2 v3
SEMOD153825-5 v5
SEMOD155615-4 v4