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 215: 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-down of the
machine. In other application the usual setting of the parameter
DFTReference
of SMAI is
InternalDFTRef
.
Example 1
1MRK 511 358-UEN A Section 21
Basic IED functions
449
Application manual
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