Analog Channel Configuration - ABB RELION REX640 Technical Manual

Protection and control

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1MRS759142 F

The fault-related current, voltage, frequency, angle values, shot pointer and the

active setting group number are taken from the moment of the operate event, or

from the beginning of the fault if only a start event occurs during the fault. The

maximum current value collects the maximum fault currents during the fault. If

frequency cannot be measured, nominal frequency is used for frequency and zero

for frequency gradient and validity is set accordingly.

The measuring mode for phase current and residual current values can be selected

Analog channel configuration

FLTRFRC has twelve analog group inputs which must be properly configured. All

inputs can be connected to GRPOFF.

Table 84: Analog inputs

There are a few special conditions which must be noted with the configuration.

Can be connected to GRPOFF

Technical Manual

A measurement mode setting parameter.

For a detailed description of the measurement modes, see

Measurement modes

See the preprocessing function blocks in this document for the possible

signal sources. The GRPOFF signal is available in the function block called

in this manual.

Three-phase currents

Residual current (measured or calculated)

Three-phase voltages

Residual voltage (measured or calculated)

Basic functions

Chapter 11.6