
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 55:
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 56:
Generator differential logic diagram 2
1MRK502052-UEN B
Section 6
Differential protection
163
Technical manual
Summary of Contents for Relion REG670
Page 1: ...Relion 670 series Generator protection REG670 2 0 IEC Technical manual ...
Page 2: ......
Page 44: ...38 ...
Page 58: ...52 ...
Page 80: ...74 ...
Page 106: ...100 ...
Page 482: ...476 ...
Page 548: ...542 ...
Page 570: ...564 ...
Page 600: ...594 ...
Page 608: ...602 ...
Page 630: ...624 ...
Page 862: ...856 ...
Page 1094: ...1088 ...
Page 1226: ...1220 ...
Page 1250: ...1244 ...
Page 1297: ...1291 ...