IdUnre
IDL1MAG
2nd and
5th
Harmonic
IDL1
AND
Cross Block
from L2 or L3
OpCrossBlock=On
IBIAS
TRIPUNREL1
STL1
TRIPRESL1
BLKHL1
en07000020.vsd
a
b
b>a
AND
Cross Block
to L2 or L3
AND
AND
AND
BLKUNRES
BLOCK
BLKRES
OR
1
INTFAULT
IEC07000020 V2 EN
Figure 57:
Generator differential logic diagram 1.
Internal/
External
Fault
discrimin
ator
STL1
STL2
STL3
OR
AND
EXTFAULT
INTFAULT
TRNSSENS
TRNSUNR
en07000021.vsd
Constant
IBIAS
a
b
b>a
Neg.Seq. Diff
Current
Contributions
OpNegSeqDiff=On
AND
BLKNSSEN
BLKNSUNR
BLOCK
IEC07000021 V2 EN
Figure 58:
Generator differential logic diagram 2.
Section 6
1MRK 502 048-UEN A
Differential protection
136
Technical manual
Summary of Contents for REG650 ANSI
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