ABB REG670 Product Manual page 61

Generator protection REG670 2.2 and Injection equipment REX060,
REX061, REX062
Product version: 2.2.1
Differential protection
Table 39. Generator differential protection GENPDIF
Function
Unrestrained differential current limit
Reset ratio
Minimum pickup
Negative sequence current level
Operate time at 0 to 2 x IdMin
restrained function
Reset time at 2 x IdMin to 0
restrained function
Operate time at 0 to 5 x IdUnre
unrestrained function
Reset time at 5 x IdUnre to 0
unrestrained function
Critical impulse time, unrestrained
function
Impulse margin time unrestrained function
Operate time at 0 to 5 x IMinNegSeq
Negative sequence unrestrained function
Reset time at 5 x IMinNegSeq to 0
Negative sequence unrestrained function
ABB
SEMOD175004-2 v10
Range or value
IBase
(1-50)p.u. of
> 95%
IBase
(0.05–1.00)p.u. of
IBase
(0.02–0.20)p.u. of
Min. = 25 ms
Max. = 35 ms
Min. = 10 ms
Max. = 25 ms
Min. = 5 ms
Max. = 15 ms
Min. = 15 ms
Max. = 30 ms
2 ms typically at 0 to 5 x IdUnre
10 ms typically
Min. = 25 ms
Max. = 35 ms
Min. = 30 ms
Max. = 45 ms
Accuracy
±1.0% of set value
-
±1.0% of I
r
±1.0% of I
r
-
-
-
-
-
-
-
-
1MRK 502 074-BEN A
61