IEC07000197.vsd
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 1
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 2
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
Task time group 3
AdDFTRefCh7
AdDFTRefCh4
IEC07000197 V2 EN-US
Figure 213:
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
1MRK 505 370-UUS A
Section 20
Basic IED functions
Busbar protection REB670 2.2 ANSI
513
Application manual
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