ABB 650 series Applications Manual page 286

Section 15
Basic IED functions
280
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 128: 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
AdDFTRefCh7
AdDFTRefCh4
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