en07000022.vsd
STL1
STL2
STL3
OR
START
BLKHL1
BLKHL2
BLKHL3
OR
BLKH
IEC07000022 V1 EN
Figure 57:
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 58:
Generator differential logic diagram 4
6.3.8
Technical data
Table 60:
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
> 95%
-
Minimum pickup
(0.05–1.00)p.u. of
IBase
±1.0% of I
r
Negative sequence current level
(0.02–0.20)p.u. of
IBase
±1.0% of I
r
Operate time at 0 to 2 x IdMin
restrained function
Min. = 25 ms
Max. = 35 ms
-
Reset time at 2 to 0 x IdMin
restrained function
Min. = 10 ms
Max. = 25 ms
-
Operate time at 0 to 5 x IdUnre
unrestrained function
Min. = 5 ms
Max. = 15 ms
-
Table continues on next page
Section 6
1MRK502052-UEN B
Differential protection
164
Technical manual
Summary of Contents for Relion REG670
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