ABB RELION REX640 - 3.17.4 Residual current preprocessing, current measured as voltage RESUTCTR; 3.17.4.1 Identification; 3.17.4.2 Function block; 3.17.4.3 Functionality

3.17.4 Residual current preprocessing, current measured as
voltage RESUTCTR
3.17.4.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE
identification
Residual current preprocessing, cur-
rent measured as voltage
RESUTCTR Io(U) Io(U)
3.17.4.2 Function block
Figure 93: Function block
3.17.4.3 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.
The output IRES_MEAS channel of the RESUTCTR can be connected to only
GSLPTOC which optionally can use this special way of current measurement.
The residual primary rated current can be set using Primary current setting.
The setting Secondary voltage defines the nominal voltage of the measuring
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 Amplitude Corr setting.
Residual current angle correction of an external measuring arrangement can be
made using Angle Correction setting.
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 Frequency
adaptivity setting under System parameter settings (Configuration> System>
Frequency adaptivity), then by setting RESUTCTR Frequency adaptivity mode to
“Enable”.
1MRS759142 F
Basic functions
REX640
Technical Manual
203