ABB REB670 Applications Manual page 479

1MRK 505 337-UUS -
Application manual
Task time group 1
SMAI instance 3 phase group
SMAI1:1 1
SMAI2:2 2
SMAI3:3 3
SMAI4:4 4
SMAI5:5 5
SMAI6:6 6
SMAI7:7 7
SMAI8:8 8
SMAI9:9 9
SMAI10:10 10
SMAI11:11 11
SMAI12:12 12
Task time group 2
SMAI instance 3 phase group
SMAI1:13 1
SMAI2:14 2
SMAI3:15 3
SMAI4:16 4
SMAI5:17 5
SMAI6:18 6
SMAI7:19 7
SMAI8:20 8
SMAI9:21 9
SMAI10:22 10
SMAI11:23 11
SMAI12:24 12
Task time group 3
SMAI instance 3 phase group
SMAI1:25 1
SMAI2:26 2
SMAI3:27 3
SMAI4:28 4
SMAI5:29 5
SMAI6:30 6
SMAI7:31 7
SMAI8:32 8
SMAI9:33 9
SMAI10:34 10
SMAI11:35 11
SMAI12:36 12
IEC07000197 V2 EN
Figure 195: Twelve SMAI instances are grouped within one task time. SMAI blocks
are available in three different task times in the IED. Two pointed
instances are used in the following examples.
The examples shows a situation with adaptive frequency tracking with one reference
selected for all instances. In practice each instance can be adapted to the needs of the actual
application. The adaptive frequency tracking is needed in IEDs that belong to the
protection system of synchronous machines and that are active during run-up and shout-
AdDFTRefCh7
AdDFTRefCh4
IEC07000197.vsd
Section 18
Basic IED functions
473