Technical Data - ABB REG650 Technical Manual

Section 5
Differential protection
5.3.7
114
STL1
STL2
STL3
BLKHL1
BLKHL2
BLKHL3
IEC07000022 V1 EN
Figure 56: Generator differential logic diagram 3.
TRIPRESL1
TRIPRESL2
TRIPRESL3
TRIPUNREL1
TRIPUNREL2
TRIPUNREL3
TRNSSENS
TRNSUNR
IEC07000023 V1 EN
Figure 57: Generator differential logic diagram 4.

Technical data

Table 33: GENPDIF technical data
Function
Reset ratio
Unrestrained differential current limit
Base sensitivity function
Negative sequence current level
Operate time, restrained function
Reset time, restrained function
Operate time, unrestrained function
Table continues on next page
OR
OR
OR
OR
Range or value
> 90%
(1-50)p.u. of
(0.05–1.00)p.u. of
IBase
(0.02–0.2)p.u. of
40 ms typically at 0 to
2 x set level
40 ms typically at 2 to
0 x set level
20 ms typically at 0 to
5 x set level
1MRK 502 034-UEN -
START
BLKH
en07000022.vsd
TRIPRES
TRIPUNRE
TRIP
OR
en07000023.vsd
Accuracy
-
IBase ± 1.0% of set value
± 1.0% of I
r
IBase
± 1.0% of I
r
-
-
-
Technical Manual