ABB REL650 Applications Manual page 487

1MRK 506 334-UUS A
Application manual
Task time group 1
SMAI instance 3 phase group
1
SMAI_20_1:1
SMAI_20_2:1 2
SMAI_20_3:1
3
SMAI_20_4:1 4
5
SMAI_20_5:1
SMAI_20_6:1 6
SMAI_20_7:1 7
SMAI_20_8:1 8
9
SMAI_20_9:1
SMAI_20_10:1 10
SMAI_20_11:1 11
SMAI_20_12:1 12
Task time group 2
SMAI instance 3 phase group
SMAI_20_1:2 1
SMAI_20_2:2
2
SMAI_20_3:2 3
SMAI_20_4:2 4
SMAI_20_5:2 5
SMAI_20_6:2 6
SMAI_20_7:2 7
SMAI_20_8:2 8
SMAI_20_9:2 9
SMAI_20_10:2 10
SMAI_20_11:2 11
SMAI_20_12:2 12
IEC09000029_1_en.vsd
IEC09000029 V1 EN
Figure 225: SMAI instances as organized in different task time groups and the
corresponding parameter numbers
The example 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
SMAI_20_7:1
BLOCK SPFCOUT
DFTSPFC AI3P
REVROT AI1
^GRP1L1 AI2
^GRP1L2 AI3
^GRP1L3 AI4
^GRP1N AIN
IEC09000028 V2 EN
Figure 226: Configuration for using an instance in task time group 1 as DFT reference
Basic IED functions
DFTRefGrp7
SMAI_20_1-12:2
BLOCK
DFTSPFC
REVROT
^GRP1L1
^GRP1L2
^GRP1L3
^GRP1N
IEC09000028-2-en.vsd
Section 17
SPFCOUT
AI3P
AI1
AI2
AI3
AI4
AIN
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