Residual Current Preprocessing, Current Measured As Voltage Resutctr - ABB RELION REX640 Technical Manual

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1MRS759142 F

Residual current preprocessing, current measured as

voltage RESUTCTR

Identification

Function description

Residual current preprocessing, cur-

rent measured as voltage

Function block

Figure 93: Function block

Functionality

The preprocessing block RESUTCTR is used for setting up the residual current

measurement when the current is measured as voltage and the measured signal

is wired via VT channel.

Input channel for RESUTCTR can be physical hardware voltage channel only.

GSLPTOC which optionally can use this special way of current measurement.

The residual primary rated current can be set using

arrangement. This is used as a reference to scale the measurements accordingly.

Residual current magnitude correction of an external measuring arrangement can

be made using

Residual current angle correction of an external measuring arrangement can be

Reverse polarity setting is used to reverse the polarity of residual CT.

Purpose of the outputs IRES_MEAS and IRES_MEAS_DR are described in the

Outputs table.

Frequency adaptivity functionality is enabled by first enabling the main

adaptivity setting under System parameter settings (Configuration > System >

Frequency adaptivity), then by setting RESUTCTR

Technical Manual

IRES_MEAS channel of the RESUTCTR can be connected to only

Secondary voltage defines the nominal voltage of the measuring

Amplitude Corr setting.

Angle Correction setting.

identification

Primary current setting.

Frequency adaptivity mode to

Basic functions

identification