ABB RELION 670 SERIES Applications Manual page 912

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Basic IED functions

down of the machine. In other application the usual setting of the parameter

DFTReference of SMAI is InternalDFTRef.

ANSI07000198 V1 EN

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

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 417) 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)

ANSI07000198.vsd

Line distance protection REL670 2.2 ANSI

1MRK 506 369-UUS -

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Application manual