Analog Channel Configuration - ABB RELION REX640 Technical Manual

1MRS759142 C
5.15.4
REX640
Technical Manual
This function contains a blocking functionality which blocks the function output and
resets Timer.
DNZSRDIR executes on the direction of either negative-sequence or
zero-sequence power and not the value. The function is generally used
for directional controls.

Analog channel configuration

DNZSRDIR has four analog group inputs which must be properly configured.
Table 1112: Analog inputs
Input
1)
I3P
2)
IRES
1)
U3P
2)
URES
1) Can be connected to GRPOFF if
2) Can be connected to GRPOFF if
See the preprocessing function blocks in this document for the
possible signal sources. The GRPOFF signal is available in the
function block called Protection.
There are a few special conditions which must be noted with the configuration.
Table 1113: Special conditions
Condition
U3P connected to real measurements
URES calculated
Improper analog channel configuration causes a validation error if the analog
channels are not completely configured or they do not match with certain settings. For
troubleshooting, check the contents of this chapter and also the preprocessing blocks
in this document. The configuration can be written to the protection relay once the
mismatch is corrected.
Protection related functions
Description
Three-phase currents
Necessary when
Residual current (measured or calculated)
Necessary when
Three-phase voltages
Necessary when
Residual voltage (measured or calculated)
Necessary when
Pol quantity is set to "Zero seq. volt."
Pol quantity is set to "Neg. seq. volt."
Description
The function can work with any two phase voltage
channels connected but it is recommended to
connect all three voltage channels.
The function requires that all three voltage
channels are connected to calculate residual
voltage. Setting
that particular UTVTR.
Section 5
Pol quantity is "Neg. seq. volt."
Pol quantity is "Zero seq. volt."
Pol quantity is "Neg. seq. volt."
Pol quantity is "Zero seq. volt."
VT connection must be "Wye" in
1189