startL1
startL2
startL3
RELL3N
RELL2N
RELL1N
OR
OR
OR
startUL1
startUL2
startUL3
OR
AND
AND
AND
OperMode = No Filter
OR
OperMode = NoPref
startUPP
IEC16000020-1-en.vsdx
IEC16000020 V1 EN-US
Figure 73:
Start
6.5.6.3
Preference logic
GUID-A7FCCE03-C841-4BAD-98F8-EB9497D53687 v1
The different operating modes (selected with
OperMode
setting) determine how the
internal status is used to release the phases of the connected distance protection.
No Filter mode
GUID-BB45C4A8-890F-4716-940C-53BBB47710F3 v1
In No Filter mode, all distance protection phases are released constantly, leaving it
to the phase selection inside the distance protection to decide which distance zone
loops should be allowed to operate.
zrelL1
zrelL2
zrelL3
TRUE
TRUE
TRUE
IEC16000021-1-en.vsdx
IEC16000021 V1 EN-US
Figure 74:
No Filter mode
No Filter mode is equivalent to disconnecting the PPL2PHIZ from the distance
protection.
No Preference mode
GUID-3D947DCA-7938-4C44-8BA6-4DA2789EDC98 v1
The ‘NoPref’ mode uses only the residual current criteria (startIN). There is no
preference provided in this mode. All three phase-to-earth loops of the distance
protection releases when a residual current start has occurred.
1MRK 506 382-UEN A
Section 6
Impedance protection
Line distance protection REL650 2.2 IEC
153
Technical manual
Summary of Contents for RELION 650 SERIES
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