ABB ret650 - Page 358

IEC07000199-2-en.vsd
SMAI1:13
BLOCK
DFTSPFC
^GRP1L1
^GRP1L2
^GRP1L3
^GRP1N
SPFCOUT
AI3P
AI1
AI2
AI3
AI4
AIN
SMAI1:1
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
IEC07000199 V3 EN-US
Figure 127: Configuration for using an instance in task time group 2 as DFT
reference.
Assume instance SMAI4:16 in task time group 2 has been selected in the
configuration to control the frequency tracking for all instances. 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 – SMAI12:12: DFTReference = ExternalDFTRef to use DFTSPFC input
as reference (SMAI4:16)
For task time group 2 this gives the following settings:
SMAI1:13: DFTRefExtOut = DFTRefGrp4 to route SMAI4:16 reference to the
SPFCOUT output, DFTReference = DFTRefGrp4 for SMAI1:13 to use SMAI4:16
as reference (see Figure
127) SMAI2:14 – SMAI12:24: DFTReference =
DFTRefGrp4 to use SMAI4:16 as reference.
For task time group 3 this gives the following settings:
SMAI1:25 – SMAI12:36: DFTReference = ExternalDFTRef to use DFTSPFC
input as reference (SMAI4:16)
Section 18 1MRK 504 169-UEN A
Basic IED functions
352 Transformer protection RET650 2.2 IEC
Application manual