Technical Data - ABB Relion Technical Manual

Section 6
Differential protection
6.4.7
148
PU_A
PU_B
OR
PU_C
BLKH_A
BLKH_B
OR
BLKH_C
ANSI07000022 V1 EN
Figure 59: Generator differential logic diagram 3.
TRIPRES_A
TRIPRES_B
TRIPRES_C
TRIPUNRE_A
TRIPUNRE_B
TRIPUNRE_C
TRNSSENS
TRNSUNR
ANSI07000023 V1 EN
Figure 60: Generator differential logic diagram 4.

Technical data

Table 49: GENPDIF (87G)technical data
Function
Unrestrained differential current limit
Reset ratio
Base sensitivity function
Negative sequence current level
Operate time, restrained function
Reset time, restrained function
Table continues on next page
OR
OR
OR
Range or value
IBase
(1-50)p.u. of
> 90%
(0.10–1.00)p.u. of
IBase
(0.02–0.4)p.u. of
40 ms typically at 0 to 2
x set level
40 ms typically at 2 to 0
x set level
1MRK 502 048-UUS A
PICKUP
BLKH
en07000022_ansi.vsd
TRIPRES
TRIPUNRE
TRIP
en07000023_ansi.vsd
Accuracy
± 1.0% of set value
-
± 1.0% of I
n
IBase
± 1.0% of I
n
-
-
Technical manual