ABB REC670 Applications Manual page 623

1MRK 511 401-UUS A
Bay control REC670 2.2 ANSI
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-US
Figure 233: 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
AdDFTRefCh7
AdDFTRefCh4
IEC07000197.vsd
Section 23
Basic IED functions
617