ABB RELION RET670, Applications Manual

Page: 505 / 1016

three signals representing the phase-to-phase measuring loops (the ZREL output). This
is to simplify the connection between PPL2PHIZ and the distance protection.
The phase-to-phase measuring loops have actually nothing to do with phase preference
and are always enabled.
The ZREL output of the PPL2PHIZ function should be connected to the RELCNDZx
inputs of the High speed distance protection ZMFPDIS. Figure
252 shows how the
information from PPL2PHIZ is affecting the interior of the distance protection. As can
be seen from the figure, the enabling signals for the six measuring loops are in AND
condition with the corresponding signals of the phase selection, loop by loop. In other
words, the phase selection inside the distance protection has to detect the fault as well
before a trip from the distance zones can be achieved.
TRUE
Bool to
Integer
ZREL
CA
BC
AB
CG
BG
AG
TRUE
TRUE
RELCNDZ1
bitwise
AND
relcndphs
enable
TRZ1
Zone1
Phase
selection
bitwise
AND
enable
TRZ2
Zone2
RELCNDZ2
RELCNDZ4
Zone5
ZMFPDIS PPL2PHIZ
Phase
preference
AG
BG
CG
enable
TRZRV
bitwise
AND
enable
bitwise
AND
enable
TRZ4
bitwise
AND
enable
TRZ5
bitwise
AND
Zone3
Zone4
ZoneRV
RELCNDZ3
RELCNDZ5
RELCNDZRV
ANSI16000017-1-en.vsdx
ANSI16000017 V1 EN-US
Figure 252: The connection of Phase preference logic function
8.20.3 Setting guidelines
GUID-01929A71-DFDA-4321-88C4-B3CDD7581F8C v1
The parameters for the Phase preference logic function PPL2PHIZ are set via the local
HMI or PCM600.
GlobalBaseSel : Selects the global base value group used by the function to define
IBase , VBase and SBase as applicable.
OperMode : The operating mode is selected. Choices includes cyclic or acyclic phase
selection in the preferred mode. This setting must be identical for all IEDs in the same
galvanic connected network part.
1MRK 504 163-UUS A
Section 8
Impedance protection
Transformer protection RET670 2.2 ANSI 499
Application manual