ABB Relion 670 Series Applications Manual page 90

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Analog inputs

shows that in this example the first three input channel of the preprocessing block is not connected

in SMT tool or ACT tool.

shows the connection made in Signal Matrix Tool (SMT), Application configuration tool (ACT), which

connects this voltage input to the fourth input channel of the preprocessing function block 5).

is a preprocessing block that has the task to digitally filter the connected analog inputs and

fundamental frequency phasors for all four input channels

harmonic content for all four input channels

positive, negative and zero sequence quantities by using the fundamental frequency phasors

for the first three input channels (channel one taken as reference for sequence quantities)

These calculated values are then available for all built-in protection and control functions within the

IED, which are connected to this preprocessing function block in the configuration tool. For this

application, most of the preprocessing settings can be left to the default values.

If frequency tracking and compensation is required (this feature is typically required only for IEDs

installed in the generating stations) then the setting parameters

accordingly.

1MRK 511 401-UEN Rev. K

DFTReference shall be set

Bay control REC670

Application manual

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