Analog Channel Configuration - ABB RELION REX640 Technical Manual

1MRS759142 C
4.8.2.4
4.8.2.5
REX640
Technical Manual

Analog channel configuration

DOPPDPR has two analog group inputs which must be properly configured.
Table 897: Analog inputs
Input
I3P
U3P
See the preprocessing function blocks in this document for the
possible signal sources.
There are a few special conditions which must be noted with the configuration.
Table 898: Special conditions
Condition
U3P connected to real measurements
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.
Operation principle
The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "On" and "Off".
The operation of DOPPDPR can be described using a module diagram. All the
modules in the diagram are explained in the next sections.
Protection functions
Description
Three-phase currents
Three-phase voltages
Description
The function can work with the corresponding one
voltage channel connected if
is set to "PhsA", "PhsB" or "PhsC".
The function can work with the corresponding two
voltage channels connected if
mode is set to "PhsAB", "PhsBC" or "PhsCA".
The function requires that all three voltage
channels are connected for other measurement
modes.
Section 4
Measurement mode
Measurement
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