en07000022.vsd
STL1
STL2
STL3
OR
START
BLKHL1
BLKHL2
BLKHL3
OR
BLKH
IEC07000022 V1 EN
Figure 59: Generator differential logic diagram 3.
en07000023.vsd
TRIPRESL1
TRIPRESL2
TRIPRESL3
OR
TRIPRES
TRIPUNREL1
TRIPUNREL2
TRIPUNREL3
OR
TRIPUNRE
OR
TRIP
TRNSUNR
TRNSSENS
IEC07000023 V1 EN
Figure 60: Generator differential logic diagram 4.
6.4.7 Technical data
Table 49: GENPDIF technical data
Function
Range or value Accuracy
Unrestrained differential current limit (1-50)p.u. of
IBase
± 1.0% of set value
Reset ratio > 90% -
Base sensitivity function (0.10–1.00)p.u. of
IBase
± 1.0% of I
r
Negative sequence current level (0.02–0.4)p.u. of
IBase
± 1.0% of I
r
Operate time, restrained function 40 ms typically at 0 to 2
x set level
-
Reset time, restrained function 40 ms typically at 2 to 0
x set level
-
Operate time, unrestrained function 20 ms typically at 0 to 5
x set level
-
Table continues on next page
1MRK 502 048-UEN A Section 6
Differential protection
137
Technical manual
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