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The directional element utilizes a set of well-established quantities to provide fast
and correct directional decision during various power system operating conditions,
including close-in three-phase faults, simultaneous faults and faults with only zero-
sequence in-feed.
6.1.3
Function block
GUID-322E158B-C2A1-4F0D-A749-01C7942875ED v1
ZMFPDIS
I3P*
U3P*
BLOCK
VTSZ
BLKZ1
BLKZ2
BLKZ3
BLKZ4
BLKZ5
BLKZRV
BLKTRZ1
BLKTRZ2
BLKTRZ3
BLKTRZ4
BLKTRZ5
BLKTRZRV
EXTNST
RELCNDZ1
RELCNDZ2
RELCNDZ3
RELCNDZ4
RELCNDZ5
RELCNDZRV
TRIP
TRZ1
TRL1Z1
TRL2Z1
TRL3Z1
TRZ2
TRL1Z2
TRL2Z2
TRL3Z2
TRZ3
TRZ4
TRZ5
TRZRV
START
STZ1
STNDZ1
STZ2
STL1Z2
STL2Z2
STL3Z2
STNDZ2
STZ3
STNDZ3
STZ4
STNDZ4
STZ5
STNDZ5
STZRV
STL1ZRV
STL2ZRV
STL3ZRV
STNDZRV
STND
STNDL1
STNDL2
STNDL3
STNDPE
STFWL1
STFWL2
STFWL3
STFWPE
STRVL1
STRVL2
STRVL3
STRVP E
STFW1PH
STFW2PH
STFW3PH
STPE
STPP
IEC11000433-5-en.vsdx
IEC11000433 V5 EN-US
Figure 30:
ZMFPDIS function block
Section 6
1MRK 506 382-UEN A
Impedance protection
88
Line distance protection REL650 2.2 IEC
Technical manual
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