IEC07000198-2-en.vsd
SMAI1:1
BLOCK
DFTSPFC
^GRP1L1
^GRP1L2
^GRP1L3
^GRP1N
SPFCOUT
AI3P
AI1
AI2
AI3
AI4
AIN
SMAI1:13
BLOCK
DFTSPFC
^GRP1L1
^GRP1L2
^GRP1L3
^GRP1N
SPFCOUT
AI3P
AI1
AI2
AI3
AI4
AIN
SMAI1:25
BLOCK
DFTSPFC
^GRP1L1
^GRP1L2
^GRP1L3
^GRP1N
SPFCOUT
AI3P
AI1
AI2
AI3
AI4
AIN
IEC07000198 V3 EN-US
Figure 126: Configuration for using an instance in task time group 1 as DFT
reference
Assume instance SMAI7:7 in task time group 1 has been selected in the
configuration to control the frequency tracking . Observe that the selected reference
instance (i.e. frequency tracking master) must be a voltage type. Observe that
positive sequence voltage is used for the frequency tracking feature.
For task time group 1 this gives the following settings (see Figure
125 for
numbering):
SMAI1:1: DFTRefExtOut = DFTRefGrp7 to route SMAI7:7 reference to the
SPFCOUT output, DFTReference = DFTRefGrp7 for SMAI1:1 to use SMAI7:7 as
reference (see Figure
126) SMAI2:2 – SMAI12:12: DFTReference = DFTRefGrp7
for SMAI2:2 – SMAI12:12 to use SMAI7:7 as reference.
For task time group 2 this gives the following settings:
SMAI1:13 – SMAI12:24: DFTReference = ExternalDFTRef to use DFTSPFC
input of SMAI1:13 as reference (SMAI7:7)
For task time group 3 this gives the following settings:
SMAI1:25 – SMAI12:36: DFTReference = ExternalDFTRef to use DFTSPFC
input as reference (SMAI7:7)
Example 2
1MRK 504 169-UEN A Section 18
Basic IED functions
Transformer protection RET650 2.2 IEC 351
Application manual
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