are converted within the zone measuring function into corresponding boolean
expressions for each condition separately. Input signal STCND is connected from
FMPSPDIS function output signal STCNDPHS.
The input signal DIRCND is used to give condition for directionality for the distance
measuring zones. The signal contains binary coded information for both forward and
reverse direction. The zone measurement function filters out the relevant signals
depending on the setting of the parameter
DirMode
. Input signal DIRCND must be
configured to the STDIRCND output signal on ZDMRDIR function.
OffsetMhoDir=
Non-directional
DirMode=Offset
OR
LDCND
LoadEnchMode=
On/Off
AND
STCND
IEC11000216-1-en.vsd
DIRCND
OffsetMhoDir=
Forward/Reverse
DirMode=
Forward/Reverse
T
F
BLKZ
BLOCK
Release
AND
AND
AND
AND
AND
T
F
True
IEC11000216 V1 EN
Figure 74:
Simplified logic for release start signal
When load encroachment mode is switched on (
LoadEnchMode=On
), start signal
STCND is also checked against LDCND signal.
Results of the directional measurement enter the logic circuits when the zone operates
in directional (forward or reverse) mode, as shown in figure
Composition of the phase start signals is presented in figure
.
Section 7
1MRK502052-UEN B
Impedance protection
194
Technical manual
Содержание Relion REG670
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