ABB Relion 670 Series Applications Manual page 575

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1MRK 511 401-UUS F

ANSI07000198 V1 EN-US

Figure 252: 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

For task time group 1 this gives the following settings (see Figure

DFTReference = DFTRefGrp7 for SMAI1:1 to use SMAI7:7 as reference (see Figure 252) SMAI2:2 –

For task time group 2 this gives the following settings:

SMAI1:13 – SMAI12:24:

reference (SMAI7:7)

For task time group 3 this gives the following settings:

SMAI1:25 – SMAI12:36:

Bay control REC670

Application manual

DFTRefExtOut = DFTRefGrp7 to route SMAI7:7 reference to the SPFCOUT output,

DFTReference = DFTRefGrp7 for SMAI2:2 – SMAI12:12 to use SMAI7:7 as reference.

DFTReference = ExternalDFTRef to use DFTSPFC input of SMAI1:13 as

DFTReference = ExternalDFTRef to use DFTSPFC input as reference

ANSI07000198.vsd

Basic IED functions

for numbering):